Hypertrophy mechanisms肌肥大机制

Place · Level 3

Mechanical tension > metabolic stress > muscle damage — 训练量决定肥大, 不是 30 分钟蛋白窗口

Three-factor model

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三因子模型

*Schoenfeld 2010* summarizes the three physiological stimuli for hypertrophy, ranked by contribution:

1. Mechanical tension: heavy loads + full ROM at the lengthened end — this is the dominant factor. Stretch activates the integrin → focal adhesion kinase → mechanistic target of rapamycin: The cell's master 'grow / build' switch — turned on by enough protein and resistance training. pathway, which is the mechanistic root.
2. Metabolic stress: the "pump" produced by high reps and short rest — real, but secondary to tension; it is not "lactate driving growth".
3. Muscle damage: micro-tears from eccentric work — originally thought to be the main factor; later evidence has demoted it.

Practical implication: spend about 80% of training in moderate-to-heavy loads with full ROM. Don't chase "feel-the-burn" or "trash myself recovering".

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本站提供科普与一般性建议，不替代医师诊断或处方；有症状或正在服药请咨询合格医师。 Educational content, not medical advice — consult a clinician for diagnosis or treatment.

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Hypertrophy mechanisms肌肥大机制

Place · Level 3

Mechanical tension > metabolic stress > muscle damage — 训练量决定肥大, 不是 30 分钟蛋白窗口

Three-factor model

Stop 1/4

三因子模型

*Schoenfeld 2010* summarizes the three physiological stimuli for hypertrophy, ranked by contribution:

1. Mechanical tension: heavy loads + full ROM at the lengthened end — this is the dominant factor. Stretch activates the integrin → focal adhesion kinase → mechanistic target of rapamycin: The cell's master 'grow / build' switch — turned on by enough protein and resistance training. pathway, which is the mechanistic root.
2. Metabolic stress: the "pump" produced by high reps and short rest — real, but secondary to tension; it is not "lactate driving growth".
3. Muscle damage: micro-tears from eccentric work — originally thought to be the main factor; later evidence has demoted it.

Practical implication: spend about 80% of training in moderate-to-heavy loads with full ROM. Don't chase "feel-the-burn" or "trash myself recovering".

Read story

本站提供科普与一般性建议，不替代医师诊断或处方；有症状或正在服药请咨询合格医师。 Educational content, not medical advice — consult a clinician for diagnosis or treatment.