The Claim
Resistance training proximity to failure, as estimated by repetitions in reserve (RIR), is not meaningfully associated with strength gains, as confidence intervals for marginal slopes in meta-regressions included the null value, indicating similar strength improvements across a wide range of RIR values.
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.
The distance from failure during resistance training, measured by repetitions in reserve, does not affect how much strength a person gains.
See the scientific wording
Resistance training proximity to failure, as estimated by repetitions in reserve (RIR), shows no meaningful association with strength gains, as confidence intervals for marginal slopes in meta-regressions included the null value, suggesting similar strength improvements across a wide range of RIR values.
When lifting weights, the nervous system recruits muscle fibers based on how hard the muscle is working. Whether someone stops short of exhaustion or pushes to the limit, the body still activates nearly all available muscle fibers when the load is heavy enough. The nervous system reaches a point where adding more effort doesn’t recruit more fibers, so strength gains stay similar no matter how close to failure the set goes.
What the research says
1 studyWhether you stop your weightlifting sets a little before exhaustion or push all the way to failure, you’ll likely gain about the same amount of strength — the science shows it doesn’t make a big difference.
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.