Neural drive vs hypertrophy

神经驱动 vs 肌纤维

Place · Level 3

Moritani 1979 经典: 训练头 4 周 80% 神经 / 20% 肥大 — 我变强了但没变大不是错觉

Connected to · 3

cofactor · 2

Muscle memory
Strength comes back fast in the first weeks of a return, and the nervous system rather than the muscle does most of that work — the same mechanism as a beginner's early strength jump.
Progressive overload
A beginner's near-daily strength gains are substantially the nervous system learning to drive existing muscle better, not new muscle. Booking all of it as hypertrophy makes the inevitable slowdown read as regression.

regulates · 1

Muscle
Weeks 1-4 of RT see 80% of strength gain from neural drive (recruitment + rate coding + synchronisation + coordination), not muscle. This is why strength and muscle size can dissociate.

Moritani 1979 classic

Stop 1/4

Moritani 1979 经典

Moritani & deVries 1979 (Am J Phys Med) is one of the foundational papers of strength training science. Design: college students did resistance training for 8 weeks, with strength gains and muscle cross-sectional area (CSA, ultrasound) measured to compare their relative contributions.

Results:

Weeks 1–4: strength ↑50–80%, but CSA increased <5%. The overwhelming majority of early strength gain is neural.Weeks 4–8: strength continued to rise, CSA began meaningful growth; the neural vs hypertrophy contribution gradually flipped.After 2 months: further strength gain came primarily from muscle hypertrophy.
When a beginner says 'I feel stronger but the mirror hasn't changed', it's not an illusion — it's the real physiology. Not seeing muscle in the first 6 weeks is normal; neural adaptation is the prelude to hypertrophy.

Read story Open mechanism

Educational content, not medical advice — consult a clinician.

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Neural drive vs hypertrophy

神经驱动 vs 肌纤维

Place · Level 3

Moritani 1979 经典: 训练头 4 周 80% 神经 / 20% 肥大 — 我变强了但没变大不是错觉

Connected to · 3

cofactor · 2

Muscle memory
Strength comes back fast in the first weeks of a return, and the nervous system rather than the muscle does most of that work — the same mechanism as a beginner's early strength jump.
Progressive overload
A beginner's near-daily strength gains are substantially the nervous system learning to drive existing muscle better, not new muscle. Booking all of it as hypertrophy makes the inevitable slowdown read as regression.

regulates · 1

Muscle
Weeks 1-4 of RT see 80% of strength gain from neural drive (recruitment + rate coding + synchronisation + coordination), not muscle. This is why strength and muscle size can dissociate.

Moritani 1979 classic

Stop 1/4

Moritani 1979 经典

Moritani & deVries 1979 (Am J Phys Med) is one of the foundational papers of strength training science. Design: college students did resistance training for 8 weeks, with strength gains and muscle cross-sectional area (CSA, ultrasound) measured to compare their relative contributions.

Results:

Weeks 1–4: strength ↑50–80%, but CSA increased <5%. The overwhelming majority of early strength gain is neural.Weeks 4–8: strength continued to rise, CSA began meaningful growth; the neural vs hypertrophy contribution gradually flipped.After 2 months: further strength gain came primarily from muscle hypertrophy.
When a beginner says 'I feel stronger but the mirror hasn't changed', it's not an illusion — it's the real physiology. Not seeing muscle in the first 6 weeks is normal; neural adaptation is the prelude to hypertrophy.

Read story Open mechanism

Educational content, not medical advice — consult a clinician.