Fiatarone 1994 (*New England Journal of Medicine*, NEJM) is the most cited randomized trial of resistance training in very old people.Who took part: · 100 frail nursing-home residents, mean age 87 · Most were living with several chronic diseases; this was not a hand-picked healthy group
How they were grouped (randomized into four arms): · High-intensity progressive resistance training · A nutritional supplement · Both · Neither
Why intensity was the point: · Exercise offered to older people used to lean gentle · The trial asked whether very old muscle still responds to training, given a heavy enough stimulus · The training arm worked the legs at 80% of : eight tenths of the heaviest weight you can lift once, a load that feels hard within a few repetitions
2 · Protocol: 10 weeks of heavy PRT
The training arm worked the hip and knee extensors at 80% of , 3 sessions a week for 10 weeks, adding weight as strength rose, always under supervision.Protocol (training arm):
· 3 sessions a week for 10 weeks · Worked the hip and knee extensors (the muscles for rising, climbing stairs and walking) at 80% of · Progressive: as strength rose, the weight went up with it, so the stimulus stayed heavy
Safety: · A trained person supervised every session · Chest pain, fainting, unusual breathlessness, or a swollen, painful calf on one side during training means stop at once and see a doctor
The intuitions it set out to correct: · Old people should lift light: light loads may not stimulate the muscle enough, so this trial deliberately raised the weight to genuinely hard · High intensity is unsafe for the elderly: under supervision and with gradual progression, these very frail people completed the training
What to take from this step: whether muscle responds depends on whether the stimulus is enough, not on age itself.
3 · Results: strength +113%
After 10 weeks, strength rose 113% in the training arm and 3% in non-exercisers, while the supplement alone had no effect on any primary outcome.After 10 weeks (94% of participants finished; in a frail group, dropouts were mostly due to illness):
Primary endpoint · strength: · Training arm +113%, non-exercisers +3% (barely changed)
Secondary endpoints: · Stair-climbing power: training +28.4%, controls +3.6% · Walking speed: training +11.8%, controls −1.0% · Thigh muscle cross-sectional area: training +2.7%, controls −1.8%, a difference that did not reach statistical significance (P = 0.11)
Strength rose far more than muscle size: most of the early gain came from the nervous system learning to call on more motor units at once, not from newly grown muscle.
Supplement alone: the supplement had no effect on any primary outcome, and training plus supplement was not clearly better than training alone. That does not make nutrition unimportant; it means that without a training stimulus, a supplement struggles to raise strength on its own.
Do not mix up the two studies: the often-quoted +174% strength, and the 48% faster tandem walking, come from the earlier Fiatarone 1990: 10 residents with a mean age of 90, 9 of whom finished, trained for 8 weeks, with no control group. The 1994 study is the randomized trial.
Later evidence: the Cochrane review by Liu & Latham 2009 pooled 121 randomized trials: progressive resistance training improves strength, walking speed, rising from a chair and stair climbing in older people, frail and healthy alike.
The one sentence it pins down: frailty is not destiny.
4 · Today: training, protein, creatine, vitamin D
Today a plan for older adults rests on resistance training 2-3 times a week, plus enough protein, creatine alongside training, and vitamin D judged by dose and blood level.Today, a plan for an older adult comes down to a few pieces:
1. Resistance training, 2-3 times a week: · Legs first, and also pushing and pulling movements · Have someone teach the movements in the first weeks; raise the weight as strength grows · After a recent cardiovascular event, with poorly controlled heart disease, or with an acute fracture, see a doctor first
2. Enough protein: · PROT-AGE recommends at least 1.2 g/kg a day for people over 65 who exercise regularly · Older muscle responds less to the same meal (anabolic resistance), so no meal should be too small; this point comes from short-term experiments, and the daily total still comes first
3. Creatine, alongside training: · Chilibeck 2017 pooled 22 randomized trials in 721 older adults taking creatine during resistance training: lean mass rose 1.37 kg more than with placebo, and chest-press and leg-press strength improved more too · Creatine safety is summarized in the Kreider 2017 position stand
4. Vitamin D, by dose and blood level: · Bischoff-Ferrari 2009: 700-1000 a day cut falls by 19%; reaching serum of ≥ 60 nmol/L (24 ng/mL) cut them by 23%; below either threshold, falls were not reduced · DO-HEALTH 2020 (2,157 people aged 70 or over, 3 years): 2000 IU of vitamin D a day, omega-3 and home strength exercise, alone or in any combination, brought no significant benefit. It is not evidence for a combined package
On weight-loss drugs: part of the weight lost is muscle. Older people using these drugs need resistance training and protein all the more.
The core stays the same: training is the step that opens the door; nutrition gives the training material to work with, and cannot replace it.