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Starting from Zero, No Gym Needed
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In one pass The body adapts only to what goes beyond the day's usual demands, so if you are starting from no exercise at all, almost any activity counts.
Educational content, not medical advice — consult a clinician.
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Chapter 1
From zero, almost anything counts
The body adapts only to what goes beyond the day's usual demands, so if you are starting from no exercise at all, almost any activity counts. What your muscles and your heart and lungs become depends on what you have been asking them to do lately. If your day moves you only between a chair, a car and a bed, then a stretch of brisk walking or a few flights of stairs is already a new demand, and the body responds by raising your muscles' ability to take up blood sugar and your heart and lungs' ability to deliver oxygen (see Progressive Overload).
This story is for people who hardly exercise now, have no gym, have little time and do not feel confident. The WHO 2020 guidelines put it this way: some activity is better than none, and bouts of any length count toward the total. How much is recommended each week, and how the extra benefit tapers off, is covered in Training for Health, Training to Improve.
A step you can take today: pick something you already do every day and make it a little harder, such as taking the stairs instead of the lift.
If you have known heart disease, or have had chest pain, unexplained breathlessness, or fainting during exertion, see a doctor for an assessment before you start. If you get chest pain or tightness, or faint, during exercise, stop and call emergency services now; see Adding more, and when to stop.
This story is for people who hardly exercise now, have no gym, have little time and do not feel confident. The WHO 2020 guidelines put it this way: some activity is better than none, and bouts of any length count toward the total. How much is recommended each week, and how the extra benefit tapers off, is covered in Training for Health, Training to Improve.
A step you can take today: pick something you already do every day and make it a little harder, such as taking the stairs instead of the lift.
If you have known heart disease, or have had chest pain, unexplained breathlessness, or fainting during exertion, see a doctor for an assessment before you start. If you get chest pain or tightness, or faint, during exercise, stop and call emergency services now; see Adding more, and when to stop.
Mechanism · Why a low start gains the most
The American College of Sports Medicine (ACSM) 2011 position stand writes this down as a training principle: to improve and maintain fitness, exercise has to go beyond the activities of daily living, and an exercise program should be adjusted to a person's habitual activity, physical function, health status and response to exercise. The same stretch of brisk walking is barely a stimulus for someone who runs every day, yet for someone who sits most of the day it already goes beyond the usual. The body adapts only to demands slightly above its current level; that is progressive overload (see Progressive Overload).Following the mechanism, the lower your starting point, the lower the bar for going beyond the usual, so the very first bit of exercise is the best value. That step is an inference; no trial has compared people by starting point. Population data says the same thing from another direction, but it can only be background: Arem 2015 pooled 6 prospective cohorts with 661,137 adults, and people active below the recommended minimum still had a 20% lower risk of death than people who did no leisure activity. That is an observed association and cannot prove that the activity caused it.
ACSM also writes that adults who are unable or unwilling to reach the recommended amount can still benefit from doing less than recommended. The WHO 2020 guidelines likewise count bouts of any length toward the total.
So for someone starting from zero, the question is not how much it takes to be worth it, but giving the body a little demand beyond the usual every day, and then adding slowly.
Chapter 2
Is a short daily session worth it?
Yes. Many of the benefits come from each session itself, not from piling up one long block of time. When a muscle contracts, it moves its glucose transporter, , to the cell surface and takes up blood sugar without needing insulin, and the effect lasts for hours after exercise. After one bout of endurance exercise, blood pressure can stay lower for up to about 22 hours. These changes do not ask how long you trained that day; they ask whether your muscles really worked.
Splitting exercise into short pieces works about as well. A that pooled 19 studies found that, for the same total time and intensity, doing it all at once or in several bouts made no difference to cardiorespiratory fitness or blood pressure.
So if you get home late with only a short window left, it is still worth moving. If your week adds up to less than the WHO range, it still counts; the benefit is just somewhat smaller than for people who do the full amount. A step you can take today: spend that window on something that leaves you a little out of breath but still able to talk, such as brisk walking or climbing stairs, rather than an easy stroll.
Splitting exercise into short pieces works about as well. A that pooled 19 studies found that, for the same total time and intensity, doing it all at once or in several bouts made no difference to cardiorespiratory fitness or blood pressure.
So if you get home late with only a short window left, it is still worth moving. If your week adds up to less than the WHO range, it still counts; the benefit is just somewhat smaller than for people who do the full amount. A step you can take today: spend that window on something that leaves you a little out of breath but still able to talk, such as brisk walking or climbing stairs, rather than an easy stroll.
Evidence · What a few flights of stairs can build
A group of Canadian studies turned stair climbing into about the most time-efficient workout there is. Allison 2017 had sedentary young women climb stairs continuously, all-out, for 20 seconds, 3 times per session, 3 days a week; after 6 weeks their maximal oxygen uptake (the most oxygen the body can use per minute, a measure of cardiorespiratory fitness) was 12% higher. With 60-second rounds of going up and down one flight instead, it rose by 7%. Neither training phase had a separate control group. Jenkins 2019 ran a : sedentary young adults climbed 3 flights of stairs (60 steps) vigorously 3 times a day, 1 to 4 hours apart, 3 days a week, and after 6 weeks their maximal oxygen uptake was higher than in a control group that did not train. The authors also note that the absolute increase was modest.A large observational study with wrist-worn trackers offers another angle. Stamatakis 2022 looked at 25,241 people in the UK Biobank who did no exercise at all (mean age 61.8) and recorded the vigorous bursts of a minute or two that happened in their daily lives, not as planned exercise. People with 3 such bursts a day had a 38%–40% lower risk of death from any cause and from cancer than people with none. That is an observed association and cannot show that those few minutes caused it: people who were already healthier are also more likely to have those bursts.
Read the limits carefully. That short, hard exercise raises fitness in sedentary people is supported by small trials, but the participants were mostly young and the trials lasted only 6 weeks; its effect on long-term health has only observational evidence so far.
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In practice · Fitting movement into a sitting day
If you sit for ten hours a day, besides the short window after work you can also slip movement into the sitting itself. The mechanism is in the sedentary office body story (see The Sedentary Office Body): what matters is how long you sit without moving. In a small randomized crossover trial, overweight adults who got up and walked for 2 minutes every 20 minutes of sitting had about a 24% smaller blood-sugar response after a meal. The American College of Sports Medicine position stand also says that breaking up sitting with frequent short bouts of standing and activity brings health benefits, even for people who already exercise.A stiff neck and shoulders are a different matter, and a few more steps will not fix them. For chronic neck pain, strength training for the neck, shoulder blades and upper limbs, combined with stretching, brings a moderate reduction in pain. These exercises need no equipment; how to do them is covered in Neck Pain.
That gives the no-gym part three pieces: a short stretch after work that leaves you a little out of breath, getting up often while you sit, and exercises aimed at the neck and shoulders.
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Chapter 3
Strength at home, no equipment
Whether a muscle grows depends on whether it has been worked close to the point where it cannot do another repetition, not on what equipment you used. One review sums it up: from fairly light to very heavy loads, muscle growth is roughly the same as long as each set is taken close to failure; how heavy the load is mainly affects maximal strength. Your own body weight is a load, and changing your position makes it lighter or heavier.
In a small randomized trial, young men did push-ups adjusted (for example on their knees) to a load matching a bench press, and after 8 weeks their strength and the muscle thickness of the chest and the back of the upper arm had grown about as much as in the bench-press group.
Many movements work at home, and the ones below are only examples of the mechanism: standing up from a chair and sitting back down works the thighs and buttocks; push-ups against a wall or on the knees work the chest, shoulders and back of the upper arm; stepping up onto a step and back down works one leg at a time. A step you can take today: pick one movement and keep going until the last few repetitions are clearly hard. The WHO 2020 guidelines recommend that adults do strength training that works all the major muscle groups on 2 or more days a week; how to arrange the movements and how to progress is covered in Resistance training basics.
In a small randomized trial, young men did push-ups adjusted (for example on their knees) to a load matching a bench press, and after 8 weeks their strength and the muscle thickness of the chest and the back of the upper arm had grown about as much as in the bench-press group.
Many movements work at home, and the ones below are only examples of the mechanism: standing up from a chair and sitting back down works the thighs and buttocks; push-ups against a wall or on the knees work the chest, shoulders and back of the upper arm; stepping up onto a step and back down works one leg at a time. A step you can take today: pick one movement and keep going until the last few repetitions are clearly hard. The WHO 2020 guidelines recommend that adults do strength training that works all the major muscle groups on 2 or more days a week; how to arrange the movements and how to progress is covered in Resistance training basics.
Evidence · Bodyweight training versus equipment
Two small randomized trials compared push-ups with the bench press directly. Kikuchi 2017 split 18 young men into two groups: one did the bench press at 40% of their maximal weight, the other did push-ups with the position adjusted (for example on the knees) to the same load, twice a week for 8 weeks. Both groups increased their maximal bench press and the thickness of the chest (pectoralis major) and the back of the upper arm (triceps); only the bench-press group also increased biceps thickness. Kotarsky 2018 had 23 men with some training background do either progressively harder push-up variations or the bench press, 3 times a week; after 4 weeks both groups had clearly raised their maximal bench press, and no change in muscle thickness was detected over those 4 weeks.Read the limits carefully. Both studies were small, the participants were all young men, they lasted only 4 to 8 weeks, and they measured only the upper body. What they show is that bodyweight movements build strength as long as the load is enough and they get harder step by step, not that bodyweight training equals equipment for everyone.
For the legs, the same mechanism predicts the same thing: standing up from a chair or stepping onto a step loads you with your own body weight, and once those movements become easy you need a harder version, such as a slower squat or a single leg, to keep going beyond the usual. Ways to make a movement progressively harder are covered in Progressive Overload.
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Chapter 4
Lifting or running, if only one
The two build different things, and the guidelines want both; if you really have to start with one, pick the one you lack more and are more likely to keep doing. Muscle decides which proteins to build according to the stimulus: long endurance training makes it build more mitochondria, so aerobic capacity rises, and heavy strength training makes it build more contractile protein, so muscle and maximal strength rise (see Training for Health, Training to Improve). Running builds little strength, and lifting cannot stand in for aerobic exercise.
By middle age, strength is the part not to skip: muscle mass and muscle function are lost with age, lifestyle shapes that loss from early adulthood onward, and strength training is currently the main way to resist it (see sarcopenia).
A step you can take today: if climbing stairs leaves you breathless, start with activity that gets you a little out of breath; if walking is fine but carrying heavy things or getting up from a low stool is getting harder, bring your strength back first. Both can start at home.
By middle age, strength is the part not to skip: muscle mass and muscle function are lost with age, lifestyle shapes that loss from early adulthood onward, and strength training is currently the main way to resist it (see sarcopenia).
A step you can take today: if climbing stairs leaves you breathless, start with activity that gets you a little out of breath; if walking is fine but carrying heavy things or getting up from a low stool is getting harder, bring your strength back first. Both can start at home.
Evidence · Is doing both linked to lower risk
Momma 2022 pooled 16 cohort studies of adults without severe disease. After accounting for aerobic activity, people who did strength training had a 10%–17% lower risk of death from any cause, cardiovascular disease, cancer and diabetes, and people who did strength training plus aerobic exercise also had a lower risk of death from any cause, cardiovascular disease and cancer. The association was clearest at roughly 30 to 60 minutes of strength training a week, and the authors note that the effect of larger amounts is unclear. These are observed associations; people who do strength training may also have been healthier to begin with.The WHO 2020 guidelines already recommend both for adults: aerobic activity, plus strength training that works all the major muscle groups on 2 or more days a week. They also state that there is no evidence that doing more strength training brings more health benefit.
So at 45, lifting or running is less a choice of one than a question of order: start with the one you lack more, and once it is a habit, add the other.
Chapter 5
How hard is enough, without a monitor
The handiest intensity gauge is your own breathing. Once exercise intensity crosses a threshold (called the ventilatory or lactate threshold), your breathing gets clearly deeper and faster, and you can no longer speak full sentences comfortably. That is why the talk test works so well: if you can still talk in full sentences fairly comfortably, you are below the threshold; once speech becomes broken and uncomfortable, you are near or past it. One review sums up that this holds in healthy people and in people with cardiovascular disease, and for walking, jogging, cycling and stair climbing alike.
The other way is to score your own effort, called the rating of perceived exertion (RPE). The common Borg scale runs from 6 to 20, with higher scores meaning more effort; in a test of 2,560 people, the score tracked both heart rate and blood lactate closely.
A step you can take today: while you exercise, try saying a full sentence. If you can finish it but are a little out of breath, that is a good intensity to start at. A heart-rate range worked out from your age can be far off for any one person, so it is not given here.
The other way is to score your own effort, called the rating of perceived exertion (RPE). The common Borg scale runs from 6 to 20, with higher scores meaning more effort; in a test of 2,560 people, the score tracked both heart rate and blood lactate closely.
A step you can take today: while you exercise, try saying a full sentence. If you can finish it but are a little out of breath, that is a good intensity to start at. A heart-rate range worked out from your age can be far off for any one person, so it is not given here.
Evidence · Can talk and effort ratings be trusted
Reed 2014 reviewed the research on the talk test: in healthy adults and in people with cardiovascular disease, speaking comfortably is usually still possible below the ventilatory or lactate threshold and is no longer comfortable above it. It held up across walking, jogging, cycling, elliptical trainers and stair steppers. The authors consider it a reliable, practical and inexpensive intensity tool for athletes, healthy adults and people with cardiovascular disease, though not well suited to judging high-intensity interval training.The evidence for perceived exertion comes from one large set of tests. Scherr 2013 had 2,560 people work through stepwise harder stages on a treadmill or exercise bike, measuring heart rate, blood lactate and the Borg score (6 to 20) at each stage. The score correlated strongly with heart rate and with blood lactate (correlation coefficients of 0.74 and 0.83). On average, the lactate threshold matched a score of about 10.8 and the individual anaerobic threshold a score of about 13.6, and sex, age, coronary heart disease and how active people usually were did not clearly change that match. The authors suggest that less trained people work at 11 to 13, and use 13 to 15 when they want harder but still mainly aerobic training.
Both tools read how your body is responding right now, not a number averaged over a population.
Myth · Why there is no heart rate for your age
Many apps and machines take 220 minus your age as your maximum heart rate and multiply it by a percentage to give you a target. The problem is the first step: the formula was never worked out in a dedicated study, and any one person's true maximum heart rate can be about 12 beats a minute above or below it, or more. Tanaka 2001 pooled 351 studies with 18,712 people, re-fitted the line as 208 minus 0.7 times age, and pointed out that the old formula runs low in older adults; but the new formula is also only an average, and for any one person the error is still there.When the starting point is off, the target range multiplied from it is off too. So this site does not give individuals heart-rate percentages; if you want to use heart rate, the most accurate way is to measure it in a cardiopulmonary exercise test at a hospital (see VO2max — endurance ceiling). For people just starting out, the talk test and an effort score are enough. Following the mechanism, they also adjust automatically as you improve: once your fitness rises, the pace at which you can still talk gets faster.
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Chapter 6
Adding more, and when to stop
First, know when you must stop. Sudden chest pain or tightness during or after exercise, or fainting during exercise: call emergency services now. Marked breathlessness, a racing heart or feeling about to faint during exercise: stop at once and do not push through; if the symptoms do not settle, seek medical care right away. If you have known heart disease, or have had chest pain, unexplained breathlessness, or fainting during exertion, see a doctor for an assessment before you start.
Beyond that, adding more is a slow business. Once the body has adapted to the old demand, that demand no longer goes beyond the usual, and that is when you add a little: a few more repetitions per set, another set, a slower movement, a harder position, or another stretch of stairs. Change one thing at a time, see how your body responds, and only then change the next (see Progressive Overload).
After a new movement, muscles that get sore a day or two later and recover within a few days are normal (see DOMS); for pain that is sharp, pinpoint, or gets worse the more you train, stop first (see Training injuries).
Beyond that, adding more is a slow business. Once the body has adapted to the old demand, that demand no longer goes beyond the usual, and that is when you add a little: a few more repetitions per set, another set, a slower movement, a harder position, or another stretch of stairs. Change one thing at a time, see how your body responds, and only then change the next (see Progressive Overload).
After a new movement, muscles that get sore a day or two later and recover within a few days are normal (see DOMS); for pain that is sharp, pinpoint, or gets worse the more you train, stop first (see Training injuries).
In practice · How to add, what to watch, when to review
There is no percentage for adding load that holds for everyone. In a randomized trial of 532 novice runners, a 13-week plan built on adding no more than 10% a week had about the same injury rate as an ordinary 8-week plan (20.8% versus 20.3%). What survives is the principle: the American College of Sports Medicine position stand says that adjusting a program to a person's habitual activity, health status and response to exercise, and raising intensity and volume gradually, may reduce the risks of exercise.A method coaches often use is called double progression: first do more repetitions at the same difficulty, and when you can do a few more than the target, move to a harder version and drop back to the low end of the repetition range. The American College of Sports Medicine progression framework for strength training follows the same idea: gradually increase load, volume or frequency.
What to watch: the same flight of stairs leaves you less out of breath, talking at the same pace feels easier, and the same number of chair stands or push-ups feels smoother. These changes take weeks to show; the stair-climbing and push-up trials lasted 4 to 8 weeks, so review in weeks, not days. When you are ill, tired or short of sleep, scale the plan down; that is part of adjusting to your health status too.
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Red flag · Signs to stop and seek care now
The signs below are not a sign of too little training and not ordinary soreness; they need action right away. This site does not diagnose; if they appear, stop first.Sudden chest pain or tightness during or after exercise that feels like pressure or squeezing, may spread to the arm, neck or jaw, and comes with breathlessness or a cold sweat: it may be a heart emergency, so call emergency services now.Fainting during exercise: call emergency services now. Anyone who has fainted, even once, should see a doctor to find the cause.Marked breathlessness, a racing heart or feeling about to faint during exercise: stop at once and do not push through; if the symptoms do not settle, seek medical care right away.Pain and swelling far out of proportion to the training you did, muscles too weak to move, and above all urine that turns cola-colored or dark like soy sauce: it may be rhabdomyolysis, so go to the emergency department immediately. Unaccustomed exercise done too hard all at once is one of its triggers.
If you have known heart disease, or have had chest pain, unexplained breathlessness, or fainting during exertion, see a doctor for an assessment before you start. The American College of Sports Medicine consensus on pre-exercise screening notes that exercise-related cardiovascular events are often preceded by warning symptoms, and that the cardiovascular risk of exercise falls as people become more active and fit. To decide whether someone should see a doctor first, it looks at three things: how active you are now, whether you have symptoms or known cardiovascular, metabolic or kidney disease, and how hard you plan to exercise.
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References · 20
- Garber, C. E., Blissmer, B., Deschenes, M. R., et al. (2011). Quantity and quality of exercise for developing and maintaining cardiorespiratory, musculoskeletal, and neuromotor fitness in apparently healthy adults. Medicine & Science in Sports & Exercise, 43(7), 1334-1359. ACSM recommends both aerobic (150 min/week moderate) and resistance (2x/week) training for all adults; concurrent training benefits for general health far exceed interference costs for non-elite individuals. Abstract (PMID 21694556): a program of regular exercise 'beyond activities of daily living to improve and maintain physical fitness and health is essential for most adults'; 'The exercise program should be modified according to an individual's habitual physical activity, physical function, health status, exercise responses, and stated goals. Adults who are unable or unwilling to meet the exercise targets outlined here still can benefit from engaging in amounts of exercise less than recommended.' 'Educating adults about and screening for signs and symptoms of CHD and gradual progression of exercise intensity and volume may reduce the risks of exercise.' 10.1249/MSS.0b013e318213fefb
- American College of Sports Medicine. (2009). Progression models in resistance training for healthy adults. Medicine & Science in Sports & Exercise, 41(3), 687-708. ACSM position stand: progressive overload through gradual increases in load, volume, or frequency; periodization optimizes long-term adaptation. 10.1249/MSS.0b013e3181915670
- Richter, E. A., & Hargreaves, M. (2013). Exercise, GLUT4, and skeletal muscle glucose uptake. Physiological Reviews, 93(3), 993-1017. Muscle contraction activates AMPK which translocates GLUT4 to the sarcolemma independently of insulin; this effect persists for hours post-exercise. 10.1152/physrev.00038.2012
- Allison, M. K., Baglole, J. H., Martin, B. J., Macinnis, M. J., Gurd, B. J., & Gibala, M. J. (2017). Brief intense stair climbing improves cardiorespiratory fitness. Medicine & Science in Sports & Exercise, 49(2), 298-307. Two studies in 31 sedentary women (age 24 ± 10 years); the training phases had no separate control group. Performing 3 × 20-s 'all-out' bouts of continuous stair climbing 3 days a week for 6 weeks raised peak oxygen uptake (VO2peak) by 12%, about 1 MET (n = 12); 3 × 60-s bouts of climbing and descending one flight of stairs, 3 days a week for 6 weeks, raised it by 7%. Heart rate and perceived exertion during the stair protocols were similar to an all-out cycling protocol. Conclusion: 'Brief, intense stair climbing is a practical, time-efficient strategy to improve CRF in previously untrained women' (abstract, PMID 28009784). 10.1249/MSS.0000000000001188
- Bull, F. C., Al-Ansari, S. S., Biddle, S., Borodulin, K., Buman, M. P., Cardon, G., et al. (2020). World Health Organization 2020 guidelines on physical activity and sedentary behaviour. British Journal of Sports Medicine, 54(24), 1451-1462. 'All adults should undertake 150-300 min of moderate-intensity, or 75-150 min of vigorous-intensity physical activity, or some equivalent combination of moderate-intensity and vigorous-intensity aerobic physical activity, per week'; the guidelines recommend regular muscle-strengthening activity for all age groups. Conclusion: 'They reaffirm messages that some physical activity is better than none, that more physical activity is better for optimal health outcomes and provide a new recommendation on reducing sedentary behaviours.' Full text (PMC7719906): adults should also do muscle-strengthening activities at moderate or greater intensity involving all major muscle groups on 2 or more days a week (strong recommendation, moderate-certainty evidence), and 'There was no evidence to support a dose-response association with higher volumes of muscle-strengthening activities.' 'MVPA bouts of any duration now count towards these recommendations, reflecting new evidence to support the value of total physical activity volume, regardless of bout length.' There is moderate-certainty evidence of a curvilinear dose-response for all-cause and CVD mortality and incident cancer and diabetes: 'More physical activity is better, although the relative benefits tend to diminish at higher levels of physical activity. However, it is not possible to specify the physical activity levels where diminishing returns begin.' Hence the recommendation that more than 300 min moderate (or 150 min vigorous) a week has additional health benefits is rated conditional. 10.1136/bjsports-2020-102955
- Riebe, D., Franklin, B. A., Thompson, P. D., Garber, C. E., Whitfield, G. P., Magal, M., & Pescatello, L. S. (2015). Updating ACSM's recommendations for exercise preparticipation health screening. Medicine & Science in Sports & Exercise, 47(11), 2473-2479. ACSM roundtable: 'there is considerable evidence that exercise is safe for most people and has many associated health and fitness benefits; exercise-related cardiovascular events are often preceded by warning signs/symptoms; and the cardiovascular risks associated with exercise lessen as individuals become more physically active/fit.' The new screening model rests on current activity level, the presence of signs or symptoms or known cardiovascular, metabolic or renal disease, and the desired exercise intensity (abstract, PMID 26473759). 10.1249/MSS.0000000000000664
- NHS. (2026). Fainting (page last reviewed 17 August 2026). Fainting is when you pass out for a short time; it is not usually serious, but anyone who has fainted should see a GP to find out what might have caused it. Causes can include standing up too quickly (which could be a sign of low blood pressure), not eating or drinking enough, being too hot, being very upset or in severe pain, heart problems, and taking drugs or drinking too much alcohol. Call 999 if someone is not breathing, cannot be woken up within 1 minute, has not fully recovered or has difficulty with speech or movement, has chest pain or a pounding, fluttering or irregular heartbeat (palpitations), has seriously hurt themselves before or after fainting, is shaking or jerking (a seizure), fainted while exercising, or fainted while lying down; do not drive yourself to A&E. If you feel about to faint: lie down with your legs raised, or if you cannot, sit with your head lowered between your knees; drink some water; cross your legs while standing up or rock up and down on your toes; clench your fists. If you see someone faint: check whether they respond by gently shaking their shoulders and asking loudly; if not, shout for help and tilt back the head and lift the chin; listen for breathing for at least 10 seconds; if they are breathing normally, lay them on their back and raise their legs (on their side if pregnant, especially over 28 weeks); they usually wake up within 30 seconds. www.nhs.uk/conditions/fainting
- Pescatello, L. S., Franklin, B. A., Fagard, R., Farquhar, W. B., Kelley, G. A., & Ray, C. A. (2004). American College of Sports Medicine position stand: Exercise and hypertension. Medicine & Science in Sports & Exercise, 36(3), 533-553. Documents post-exercise hypotension persisting ~22 h after a single moderate-intensity session; recommends timing training to coincide with morning BP peak. 10.1249/01.MSS.0000115224.88514.3A
- Murphy, M. H., Lahart, I., Carlin, A., & Murtagh, E. (2019). The effects of continuous compared to accumulated exercise on health: a meta-analytic review. Sports Medicine, 49(10), 1585-1607. 19 studies, 1,080 adults, comparing a single bout of exercise with the same total duration, mode and intensity accumulated in multiple shorter bouts over the day. There were no differences between accumulated and continuous groups for any cardiorespiratory fitness or blood pressure outcome; body mass change favored accumulated exercise (MD -0.92 kg, five studies) and LDL cholesterol fell more with accumulated exercise in two small studies. Conclusion: 'There is no difference between continuous and accumulated patterns of exercise in terms of effects on fitness, blood pressure, lipids, insulin and glucose'; 'adults are likely to accrue similar health benefits from exercising in a single bout or accumulating activity from shorter bouts throughout the day' (abstract, PMID 31267483). 10.1007/s40279-019-01145-2
- Arem, H., Moore, S. C., Patel, A., Hartge, P., Berrington de Gonzalez, A., Visvanathan, K., et al. (2015). Leisure time physical activity and mortality: a detailed pooled analysis of the dose-response relationship. JAMA Internal Medicine, 175(6), 959-967. Pooled analysis of 6 prospective cohorts (661,137 adults, median follow-up 14.2 years, self-reported leisure-time activity). Compared with no leisure-time activity: 20% lower mortality below the recommended minimum (HR 0.80), 31% lower at 1 to 2 times the minimum (HR 0.69), 37% lower at 2 to 3 times (HR 0.63); 'An upper threshold for mortality benefit occurred at 3 to 5 times the physical activity recommendation (HR, 0.61 [95% CI, 0.59-0.62]); however, compared with the recommended minimum, the additional benefit was modest (31% vs 39%). There was no evidence of harm at 10 or more times the recommended minimum (HR, 0.69 [95% CI, 0.59-0.78]).' Conclusion: meeting the minimum 'was associated with nearly the maximum longevity benefit'; health professionals 'do not need to discourage adults who already participate in high-activity levels.' Observational associations (abstract, PMID 25844730). 10.1001/jamainternmed.2015.0533
- Schoenfeld, B. J., Grgic, J., Van Every, D. W., & Plotkin, D. L. (2021). Loading recommendations for muscle strength, hypertrophy, and local endurance: a re-examination of the repetition continuum. Sports, 9(2), 32. Synthesises the modern view that hypertrophy is roughly equivalent across a wide load range (≈30-85% 1RM / 6-30 reps) provided sets are taken close to failure; load specificity matters most for maximal strength. 10.3390/sports9020032
- Kikuchi, N., & Nakazato, K. (2017). Low-load bench press and push-up induce similar muscle hypertrophy and strength gain. Journal of Exercise Science & Fitness, 15(1), 37-42. 18 young men were randomly assigned to bench press at 40% of one-repetition maximum (1RM) or to push-ups with the body position adjusted (e.g. kneeling) to the same load, twice a week for 8 weeks. Both groups increased bench-press 1RM and triceps and pectoralis major thickness; biceps thickness increased only with the bench press. Conclusion: 'Push-up exercise with similar load to 40%1RM bench press is comparably effective for muscle hypertrophy and strength gain over an 8-week training period' (abstract, PMID 29541130). 10.1016/j.jesf.2017.06.003
- Coffey, V. G., & Hawley, J. A. (2007). The molecular bases of training adaptation. Sports Medicine, 37(9), 737-763. 'The functional consequences of these adaptations are determined by training volume, intensity and frequency, and the half-life of the protein. Moreover, many features of the training adaptation are specific to the type of stimulus, such as the mode of exercise.' Prolonged endurance training elicits mitochondrial biogenesis, fast-to-slow fibre-type transformation and changes in substrate metabolism; heavy resistance exercise stimulates synthesis of contractile proteins responsible for hypertrophy and increased maximal force; the genetic and molecular mechanisms of the two are distinct. The authors add that it cannot yet be claimed that this molecular work has influenced the training practices of elite athletes (abstract, PMID 17722947). 10.2165/00007256-200737090-00001
- Cruz-Jentoft, A. J., & Sayer, A. A. (2019). Sarcopenia. The Lancet, 393(10191), 2636-2646. 10.1016/S0140-6736(19)31138-9
- Momma, H., Kawakami, R., Honda, T., & Sawada, S. S. (2022). Muscle-strengthening activities are associated with lower risk and mortality in major non-communicable diseases: a systematic review and meta-analysis of cohort studies. British Journal of Sports Medicine, 56(13), 755-763. 16 prospective cohort studies of adults without severe health conditions. Muscle-strengthening activities were associated with a 10-17% lower risk of all-cause mortality, cardiovascular disease, total cancer, diabetes and lung cancer, independent of aerobic activity, with J-shaped associations and the maximum risk reduction at about 30-60 min a week for all-cause mortality, CVD and total cancer. 'Combined muscle-strengthening and aerobic activities (versus none) were associated with a lower risk of all-cause, CVD and total cancer mortality.' Conclusion: muscle-strengthening activities were inversely associated with the risk of all-cause mortality and major non-communicable diseases; 'however, the influence of a higher volume of muscle-strengthening activities on all-cause mortality, CVD and total cancer is unclear when considering the observed J-shaped associations.' Observational (abstract, PMID 35228201). 10.1136/bjsports-2021-105061
- Reed, J. L., & Pipe, A. L. (2014). The talk test: a useful tool for prescribing and monitoring exercise intensity. Current Opinion in Cardiology, 29(5), 475-480. 'In healthy adults and patients with cardiovascular disease, comfortable speech is likely possible (equivocal or last positive talk test stage) when exercise intensity is below the ventilatory or lactate threshold, and not likely possible (negative talk test stage) when exercise intensity exceeds the ventilatory or lactate threshold.' The talk test has been consistent across walking, jogging, cycling, elliptical trainer and stair stepper, and may not be practical for high-intensity interval training. Summary: it 'is a valid, reliable, practical and inexpensive tool for prescribing and monitoring exercise intensity in competitive athletes, healthy active adults and patients with cardiovascular disease' (abstract, PMID 25010379). 10.1097/HCO.0000000000000097
- Scherr, J., Wolfarth, B., Christle, J. W., Pressler, A., Wagenpfeil, S., & Halle, M. (2013). Associations between Borg's rating of perceived exertion and physiological measures of exercise intensity. European Journal of Applied Physiology, 113(1), 147-155. 2,560 men and women (median age 28 years) completed incremental treadmill or cycle tests, with heart rate, blood lactate and rating of perceived exertion (RPE, Borg 6-20 scale) measured at the end of each stage. RPE was strongly correlated with heart rate (r = 0.74) and blood lactate (r = 0.83); the lactate threshold and the individual anaerobic threshold corresponded to an RPE of 10.8 ± 1.8 and 13.6 ± 1.8. Sex, age, coronary artery disease, physical activity status and testing modality did not significantly influence the association. Conclusion: Borg's RPE 'seems to be an affordable, practical and valid tool for monitoring and prescribing exercise intensity'; an RPE of 11-13 is recommended for less trained individuals, and 13-15 when more intense but still aerobic training is desired (abstract, PMID 22615009). 10.1007/s00421-012-2421-x
- Tanaka, H., Monahan, K. D., & Seals, D. R. (2001). Age-predicted maximal heart rate revisited. Journal of the American College of Cardiology, 37(1), 153-156. Reanalysis of 351 studies (n=18,712) yields HRmax = 208 − 0.7×age, more accurate than the legacy 220 − age formula (which carries ±10-12 bpm individual error). 10.1016/S0735-1097(00)01054-8
- NHS. (2026). Heart attack: symptoms. Symptoms can include chest pain that may feel like crushing or squeezing on the chest and may spread to the arm, neck and jaw; feeling short of breath; feeling or being sick; feeling like indigestion; sweating; and pale, blue or grey skin. Call 999 for chest pain that feels tight or like squeezing, or that spreads to the arms, neck or jaw, with severe difficulty breathing, or if someone becomes unresponsive. A heart attack needs emergency treatment in hospital (page last reviewed 31 March 2026). www.nhs.uk/conditions/heart-attack/symptoms
- Cheung, K., Hume, P. A., & Maxwell, L. (2003). Delayed onset muscle soreness: treatment strategies and performance factors. Sports Medicine, 33(2), 145-164. 10.2165/00007256-200333020-00005