The Interference Effect

干扰效应 · 力量和耐力会互相拖后腿吗

Place · Level 3 · Movement

同时练力量和耐力确有干扰, 但被夸大 · 主要影响高量耐力、跑步比骑车更甚 · 靠排序/模式/间隔基本可化解 · 顺带认识过度训练的边界

Connected to · 4

cofactor · 3

Protein + lifting
When strength and endurance run together, the build side rests on adequate protein and recovery. 1.6-2.2 g/kg is the line that keeps the synthetic signal supplied — undersupplied, interference looks bigger than it is.
Progressive overload
How much interference you get is largely a volume question. Keep the weekly load of both modalities inside what you can recover from and it shrinks to negligible; let volume run away and it starts to bite.
Recovery science
What concurrent training hits first is usually not interference but the recovery ceiling. Regular deloads and watching sleep and mood are what let both modalities stay in the plan.

regulates · 1

VO2max
Skipping cardio for fear of losing muscle is a bad trade: cardiorespiratory fitness is among the strongest predictors of all-cause mortality, and the interference from running both is far smaller than that.

The hypothesis · two opposing signals

Stop 1/5

干扰假说 · 两个相反的信号

'I want both muscular strength and good cardio — will they fight each other?' This is the famous 'interference effect', discussed since Hickson's 1980 observation.

Its mechanistic intuition is a molecular tug-of-war: endurance training mainly activates a signal called (roughly 'the cell is low on energy, enter an energy-saving, endurance-efficiency mode'), while strength training mainly activates the pathway ('build, synthesize protein, grow muscle'). These two are to some degree opposite in orientation — one leans 'save', the other 'build'. In theory, chronically stimulating both heavily at once may have the 'save' side blunt the 'build' side.

It's a real phenomenon, but the key questions are: how big is it, and what does it mean for an ordinary trainee? The next scene looks at the evidence.

Read story Open mechanism

Educational content, not medical advice — consult a clinician.

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The Interference Effect

干扰效应 · 力量和耐力会互相拖后腿吗

Place · Level 3 · Movement

同时练力量和耐力确有干扰, 但被夸大 · 主要影响高量耐力、跑步比骑车更甚 · 靠排序/模式/间隔基本可化解 · 顺带认识过度训练的边界

Connected to · 4

cofactor · 3

Protein + lifting
When strength and endurance run together, the build side rests on adequate protein and recovery. 1.6-2.2 g/kg is the line that keeps the synthetic signal supplied — undersupplied, interference looks bigger than it is.
Progressive overload
How much interference you get is largely a volume question. Keep the weekly load of both modalities inside what you can recover from and it shrinks to negligible; let volume run away and it starts to bite.
Recovery science
What concurrent training hits first is usually not interference but the recovery ceiling. Regular deloads and watching sleep and mood are what let both modalities stay in the plan.

regulates · 1

VO2max
Skipping cardio for fear of losing muscle is a bad trade: cardiorespiratory fitness is among the strongest predictors of all-cause mortality, and the interference from running both is far smaller than that.

The hypothesis · two opposing signals

Stop 1/5

干扰假说 · 两个相反的信号

'I want both muscular strength and good cardio — will they fight each other?' This is the famous 'interference effect', discussed since Hickson's 1980 observation.

Its mechanistic intuition is a molecular tug-of-war: endurance training mainly activates a signal called (roughly 'the cell is low on energy, enter an energy-saving, endurance-efficiency mode'), while strength training mainly activates the pathway ('build, synthesize protein, grow muscle'). These two are to some degree opposite in orientation — one leans 'save', the other 'build'. In theory, chronically stimulating both heavily at once may have the 'save' side blunt the 'build' side.

It's a real phenomenon, but the key questions are: how big is it, and what does it mean for an ordinary trainee? The next scene looks at the evidence.

Read story Open mechanism

Educational content, not medical advice — consult a clinician.