The Claim
Training to failure during resistance exercise impairs gains in fast-twitch muscle power at 180°/s in previously untrained young women, whereas submaximal training with equal volume preserves or enhances these adaptations.
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 previously untrained young women, lifting weights until muscle failure reduces gains in explosive leg power at high speeds compared to lifting with the same total effort but stopping short of failure.
See the scientific wording
Training to failure during resistance exercise may impair gains in fast-twitch muscle power at high velocities (180°/s) in previously untrained young women, while submaximal training with equal volume preserves or enhances these adaptations.
When muscles are pushed to complete exhaustion, the nerves controlling them become less able to send strong signals quickly, which reduces the number of fast-twitch muscle fibers that can fire at high speeds, making powerful movements slower.
What the research says
1 studyPushing your muscles to exhaustion during weight training didn't help you kick or punch faster, but stopping before total fatigue did. So, going all-out might hurt your speed and power, even if it makes your muscles bigger.
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.