The Claim
High-volume resistance exercise to failure (8–12 repetitions per set) elevates plasma concentrations of growth hormone, insulin-like growth factor-1, prolactin, and creatine kinase more than non-failure protocols in young, trained men.
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 young, trained men, performing resistance exercises to muscle failure with 8–12 repetitions increases blood levels of growth hormone, insulin-like growth factor-1, prolactin, and creatine kinase more than performing the same exercises without reaching failure.
See the scientific wording
High-volume resistance exercise to failure (8–12 repetitions per set) elevates plasma concentrations of growth hormone, insulin-like growth factor-1, prolactin, and creatine kinase more than non-failure protocols, indicating greater metabolic stress and muscle damage in young, trained men.
When muscles are pushed to exhaustion with many repetitions, they run out of energy, become acidic, and tear slightly. This triggers the brain to release stress hormones, and damaged muscle cells leak enzymes into the blood.
What the research says
1 studyStudy: Time Course of Recovery From Resistance Exercise With Different Set Configurations.
When people lift weights until they can't do another rep, especially with lots of reps, their bodies release more stress hormones and show more signs of muscle damage than if they stop before exhaustion. This study proved that exact thing.
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.