The Claim
Low-load resistance training at 40% one-repetition maximum performed to volitional failure or 20% velocity loss for 8 weeks, twice weekly, induces similar increases in muscle hypertrophy of the pectoralis major and triceps brachii in recreationally active young men, regardless of whether failure mode is volitional failure or velocity fatigue, indicating that training volume is the primary driver of muscle growth under these conditions.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
In recreationally active young men, performing low-weight resistance training twice a week for eight weeks to either muscle fatigue or a 20% drop in movement speed results in the same amount of muscle growth in the chest and triceps, showing that total training volume determines muscle growth more than how fatigue is reached.
See the scientific wording
Low-load resistance training (40% one-repetition maximum) performed to volitional failure or velocity fatigue (20% velocity loss) for 8 weeks, twice weekly, induces similar increases in muscle hypertrophy of the pectoralis major and triceps brachii in recreationally active young men, despite differences in training protocol, indicating that training volume and not failure mode is the primary driver of muscle growth under these conditions.
When muscles are worked with light weights until they can't move anymore, the buildup of waste products and sustained muscle tension triggers signals that tell the muscle to build more protein, making it bigger over time.
What the research says
1 studyThe study randomly assigned participants to either volitional failure or velocity fatigue groups using identical low-load (40% 1RM) and matched total work volume. Both groups showed statistically equivalent increases in pectoralis major and triceps brachii thickness, with no significant differences in composite hypertrophy scores, supporting the conclusion that failure mode does not alter hypertrophic outcomes when volume is controlled.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.