Minimum effective training dose to increase 1RM strength in trained men
A single hard set can work
Key Findings
From 2629 initial records, 6 studies met inclusion; all showed that a single set performed 1–3 times per week was sufficient for significant 1RM gains in resistance-trained men.
Meta-analysis of 5 studies — estimated 1RM increase for the lowest-dose groups: overall +12.09 kg (95% CI 8.16–16.03), squat +17.48 kg (8.51–26.46), bench press +8.25 kg (0.68–15.83).
Authors' summary of the effective minimal protocol: a single set of 6–12 reps at ~70–85% 1RM, 2–3×/week, with high intensity of effort (reaching volitional or momentary failure), for 8–12 weeks → suboptimal but significant squat and bench 1RM gains. Load (%1RM) was not reported by all studies.
Unclear whether this transfers to the deadlift, to trained women, or to highly trained strength athletes.
Practical Application
Systematic review of 6 studies in resistance-trained men: one set of 6–12 reps at ~70–85% 1RM, 2–3 times a week, taken to (near) failure for 8–12 weeks still raised 1RM (pooled +12.09 kg overall, +17.48 kg squat, +8.25 kg bench) — suboptimal but significant.
During high-volume endurance weeks: drop to ~1 hard set per main lift, 2–3×/wk at 70–85% 1RM — enough to keep BUILDING strength in trained men.
Bank the minimum dose as anti-detraining insurance at minimal recovery cost (inference: the review measured gains, not detraining).
Effort is non-negotiable at this volume — the included protocols went to volitional or momentary failure.
Limitations
Only 6 studies (5 pooled), trained MEN only, single-reviewer search; "minimum effective" ≠ optimal; requires failure-level effort (fatigue per set higher than volume implies); deadlift, women and highly trained lifters uncertain.
How this entry was checked and changed
Why this level
regraded 2026-09-27 from A: SR/MA of few, small trials (6 included, 5 pooled) with a single-reviewer search (rubric: SR/MA with mostly small trials = A-)
Content correction 2026-09-27
Level A -> A- per rubric (few small trials, one reviewer). Clarified that the meta-analysis pooled 5 of the 6 studies; squat/bench CIs, the 2629-record search, failure-level effort and the deadlift/women caveat added from the abstract; "anti-detraining" use labelled inference.