The Claim
In untrained men, resistance training performed to concentric muscle failure at 70% one-repetition maximum over 8 weeks produces medium effect size gains in muscle strength (ES: 0.43–0.57) and muscle cross-sectional area (ES: 0.29–0.53), regardless of whether repetition duration is self-selected or controlled.
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 untrained men, performing resistance training to muscle failure at 70% of maximum strength for 8 weeks results in measurable increases in muscle strength and muscle size, whether the pace of each repetition is chosen by the person or fixed by a protocol.
See the scientific wording
In untrained men, resistance training performed to concentric muscle failure at 70% one-repetition maximum produces medium effect size gains in muscle strength (ES: 0.43–0.57) and muscle cross-sectional area (ES: 0.29–0.53) over 8 weeks, regardless of whether repetition duration is self-selected or controlled.
Lifting weights until muscle failure creates strong pulling forces and builds up waste products in the muscle, which signals the body to build more muscle tissue and improve how well nerves activate the muscle.
What the research says
1 studyFor beginners, lifting weights until you can't do another rep at a moderate weight makes you stronger and builds muscle, whether you lift fast or slow — the study proved both ways work just as well.
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.