Research
Mixed
Mechanical tension, muscle damage, and metabolic stress are the three primary factors responsible for initiating the hypertrophic response to resistance exercise.
Design your workouts to include heavy loads (mechanical tension), exercises that cause some muscle soreness/damage (muscle damage), and sets that leave you pumped with metabolites (metabolic stress). All three contribute to growth.
StrongSupportsVERY_HIGH confidence
It is hypothesized that 3 primary factors are responsible for initiating the hypertrophic response to resistance exercise: mechanical tension, muscle damage, and metabolic stress (38,79,153,185).
Why this rating
This is a foundational premise of the review, supported by extensive citation of basic science.
Source
The Mechanisms of Muscle Hypertrophy and Their Application to Resistance Training
Brad J. Schöenfeld · The Journal of Strength and Conditioning Research · 2010
DOI 10.1519/jsc.0b013e3181e840f3
narrative_reviewCited 1,174×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
More from this paper
- Resistance training protocols utilizing moderate repetition ranges (approximately 6-12 reps) optimize muscle hypertrophy by maximizing metabolic stress, whereas high-repetition training is inferior unless artificial ischemia is applied.Good
- Low-intensity resistance training combined with vascular occlusion (blood flow restriction) produces hypertrophic gains similar to high-intensity training without occlusion.Good
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