The Claim
Training to momentary muscular failure results in a reduction in total repetitions performed across multiple sets compared to training at 1 repetition in reserve, due to fatigue-induced performance decay, despite higher initial repetitions.
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.
When lifting weights until complete exhaustion, the total number of repetitions performed across all sets is lower than when stopping one repetition before failure, because fatigue reduces performance in later sets, even if the first set has more reps.
See the scientific wording
Training to momentary muscular failure reduces total repetitions performed across multiple sets compared to training at 1-RIR, despite higher initial repetitions, indicating that proximity-to-failure influences volume accumulation through fatigue-induced performance decay.
When lifting weights until you can't do another rep, muscle fibers work harder and produce more waste chemicals, which slow down the muscle's ability to contract. At the same time, the brain reduces signals to the muscles to prevent damage. This combination makes each next set harder to complete, so fewer reps are done overall, even if the first set had more reps.
What the research says
1 studyWhen you lift weights until you can't do another rep, you get way more tired by the last set than if you stop one rep short — so you end up doing fewer reps overall across all sets.
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.