Use 30–60s rest between sets
- New evidence does not support a universal 30–60 second rule between lifting sets; rest length should match whether the goal is endurance, size, or strength. - A 2024 meta-analysis found a small hypertrophy edge when rests exceed 60 seconds, with no clear added benefit once breaks stretch past 90 seconds. - The American College of Sports Medicine updated its guidance in March 2026 after reviewing 137 studies and 30,000 participants. (acsm.org)
The simple rule to rest 30–60 seconds between every set does not hold up across all lifting goals. (acsm.org) (frontiersin.org) The American College of Sports Medicine said on March 18, 2026 that its new resistance-training position stand draws on 137 reviews and more than 30,000 participants. (acsm.org) That update replaced the group’s 2009 guidance and framed rest periods as one training variable among several, alongside load, sets, and weekly frequency. (acsm.org) For muscle size, a 2024 systematic review and Bayesian meta-analysis found a small advantage for resting more than 60 seconds between sets. (frontiersin.org) That same review did not find meaningful extra hypertrophy when rest periods went beyond 90 seconds, with results from nine studies and 19 measurements overlapping heavily. (frontiersin.org) For strength, the broader evidence points in a different direction: heavier loads tend to produce the biggest gains, and longer rests help preserve performance across sets. (bjsm.bmj.com) (nsca.com) A 2023 Bayesian network meta-analysis in the British Journal of Sports Medicine found all resistance-training prescriptions beat doing nothing, but higher-load, multiset plans ranked highest for strength. (bjsm.bmj.com) That means a lifter chasing muscular endurance may tolerate shorter breaks, while someone training for maximal strength usually needs more recovery to repeat heavy efforts. (nsca.com) (acsm.org) The newer consensus is less about one stopwatch number and more about matching rest to the job of the set. (acsm.org) (frontiersin.org)
