Do you need to go all the way to failure to grow muscles?
Influence of Resistance Training Proximity-to-Failure on Skeletal Muscle Hypertrophy: A Systematic Review with Meta-analysis
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Surprising Findings
Training to set failure (any definition) showed a tiny benefit (ES = 0.19, p = 0.045), but this vanished when only studies using ‘momentary failure’ were analyzed.
People assume ‘failure’ means total exhaustion — but if a study calls ‘stopping when form breaks’ as failure, it’s not the same as true muscular failure. This exposes how sloppy terminology muddies the science.
Practical Takeaways
Stop training every set to failure. Instead, aim for 2–4 reps in reserve (RIR) on most sets, and only go to failure on your last set of the day.
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Surprising Findings
Training to set failure (any definition) showed a tiny benefit (ES = 0.19, p = 0.045), but this vanished when only studies using ‘momentary failure’ were analyzed.
People assume ‘failure’ means total exhaustion — but if a study calls ‘stopping when form breaks’ as failure, it’s not the same as true muscular failure. This exposes how sloppy terminology muddies the science.
Practical Takeaways
Stop training every set to failure. Instead, aim for 2–4 reps in reserve (RIR) on most sets, and only go to failure on your last set of the day.
Publication
Journal
Sports Medicine (Auckland, N.z.)
Year
2022
Authors
Martin C. Refalo, E. Helms, Eric T Trexler, D. Hamilton, J. Fyfe
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Claims (6)
When people who’ve never lifted weights before start training, some gain just a little muscle—like half a kilo—while others gain a lot, up to three kilos, in about two to three months.
You don’t need to push your muscles to absolute exhaustion to grow them—working them pretty hard (but not all the way to failure) might give you just as much muscle growth as going all out.
Doing more sets of weightlifting seems to build muscle more reliably than how close you get to failing on each set—whether you stop short or push to exhaustion doesn’t change the muscle growth much if you’re doing the same number of sets.
Lifting weights until you can't do another rep doesn't help you build more muscle than stopping before you hit total exhaustion—so you don't need to push yourself to the absolute limit to get the best results.
Pushing yourself harder during weightlifting by stopping later (more than 25% slower than your fastest rep) doesn’t help you build more muscle than stopping a bit earlier (20–25% slower)—the difference is so tiny it doesn’t really matter.