ACSM rewrites lifting rules
The American College of Sports Medicine published its first strength‑training guideline update in 17 years and explicitly debunked rigid rules like fixed 'time under tension' — the emphasis is now on individualization, consistency, and what actually drives strength and size. (lifehacker.com, medicalnewstoday.com).
The American College of Sports Medicine published a Position Stand titled “Resistance Training Prescription for Muscle Function, Hypertrophy, and Physical Performance in Healthy Adults: An Overview of Reviews” on March 17, 2026, and the paper appears in Medicine & Science in Sports & Exercise. (acsm.org) The overview pooled evidence from 137 systematic reviews covering more than 30,000 participants, with the literature search for the umbrella review current through October 2024. (acsm.org) Numeric prescriptions in the Statement include ~80% of one‑rep max for strength (about 2–3 sets per exercise), approximately 10 weekly sets per muscle group for hypertrophy, and 30–70% 1RM for power with emphasis on fast concentric action. (acsm.org) The document highlights that elastic bands, bodyweight and home‑based routines produce marked improvements in strength and size, and it reports that many so‑called “advanced” techniques (training to failure, favored machines, or complex periodization) are not consistently superior for the average healthy adult. (acsm.org) Stuart M. Phillips, PhD, FACSM, is named among the authors and is quoted in ACSM materials saying, “The best resistance training program is the one you’ll actually stick with.” (acsm.org) ACSM describes using an umbrella‑review methodology that applied the FITT‑VP framework (frequency/intensity/time/type/volume/progression) and assessed review quality with AMSTAR to generate the evidence‑based recommendations. (acsm.org)
