ACSM strength training guidelines 2026: the new position stand, explained for home lifters

The American College of Sports Medicine's 2026 position stand, built from 137 systematic reviews covering more than 30,000 adults, says healthy adults should lift with high effort at least twice a week, working all major muscle groups. For strength, heavier loads (80 percent of one-rep max or more), 2 to 3 sets, a full range of motion and doing the lift early in the session helped; for muscle size, 10 or more sets per muscle group a week.

Updated October 31, 2026. By the BASALT editorial team.

In 2026 the American College of Sports Medicine (ACSM) replaced its 2009 advice on how to lift with a new position stand on resistance training for healthy adults. This page explains what it found, what changed, how strong the evidence is behind each recommendation, and what it means if you train at home with a barbell and plates. We read the stand itself, not just its summary: the abstract on PubMed and the open access full text on Europe PMC, both on 31 Oct 2026, though not its online supplementary appendices. The summary is ours, every number on this page is in the 2026 stand or in the 2009 stand's abstract, and each section says which. It is general information, not medical advice.

What the stand is

The paper is "American College of Sports Medicine Position Stand. Resistance Training Prescription for Muscle Function, Hypertrophy, and Physical Performance in Healthy Adults: An Overview of Reviews," by 13 authors with Brad S. Currier as first author. It appeared online in March 2026 and in the April 2026 issue of Medicine & Science in Sports & Exercise (volume 58, issue 4, pages 851 to 872), as an official ACSM pronouncement reviewed by its Pronouncements Committee. It updates the 2009 stand, "Progression Models in Resistance Training for Healthy Adults."

It is an overview of reviews: rather than run a new trial, the authors gathered 137 systematic reviews of randomized trials, covering more than 30,000 participants. Each review had to compare a resistance training program of at least 6 weeks (6 to 52 weeks in the reviews) in healthy adults aged 18 or older against no exercise or against a different program. The literature search ran to October 2024. Most people in those trials were new to lifting, and the reviews were not split by age.

How the stand grades its evidence

For each training variable (load, sets, frequency, rest and so on) and each outcome (strength, muscle size, power and others), the stand gives one of three verdicts: it helps, it makes no difference, or there is not enough evidence to tell. Beside each verdict it reports how many reviews and participants stand behind it, and a quality of evidence score from 0 to 100 percent, built from whether each review pooled its trials in a meta-analysis and how it rated on AMSTAR, a checklist for judging systematic reviews. The authors note that no standard method exists yet for grading certainty in an overview of reviews, so the score is their adaptation of the GRADE approach. On this page, "quality 79 percent" means that score.

Against no exercise at all, ordinary resistance training improved strength (26 reviews, 23,204 participants, quality 73 percent), muscle size (12 reviews, 14,924 participants, quality 79 percent) and power (4 reviews, 1,001 participants, quality 63 percent). The tables below are about the next question: which choices within a program add to that.

What changed from the 2009 stand

Two details from the new stand explain the shift. Its authors point out that the 2009 stand gave its top evidence grade to two to three full body sessions a week for muscle growth in novices, yet that advice rested on three studies with 59 participants in total, two of which did not test frequency. And they cite an estimate, from a 2009 paper challenging that stand, that meeting the old guidelines for strength, muscle size and power together could, in some cases, take 20 hours or more of training a week, which, they write, may make the old advice less relevant for most adults, particularly older adults.

The recommendations, by goal

The stand's main advice applies to every goal: healthy adults should lift with high effort at least twice a week, working all the major muscle groups, and keep the training progressive. By goal, these are the choices it found add to the result compared with ordinary training, with the evidence behind each.

Muscular endurance. Training improved it compared with no exercise, but there was not enough evidence to say which load, volume or set structure works best, so the 2026 stand gives no endurance prescription. The 2009 stand had advised light to moderate loads of 40 to 60 percent of one-rep max for more than 15 reps, with rests under 90 seconds.

Everyday function. Compared with no exercise, training improved walking speed, balance, standing up from a chair and the timed up-and-go test, and power training improved combined scores of physical function more than standard training did.

Sets in practice. The authors advise at least two sets per exercise. They cite an analysis in which gains kept rising with more sets but leveled off beyond about 2 to 3 sets per exercise for strength and about 18 to 20 weekly sets for muscle size, and they expect each extra set to add less than the one before.

What the stand says matters little

• Training to failure. Sets taken to momentary failure did not add strength (3 reviews, 1,371 participants, quality 83 percent) or muscle size (4 reviews, 800 participants, quality 69 percent), so the stand calls failure unnecessary, and possibly inadvisable for some groups such as older people. It says sets near failure, around 2 to 3 reps in reserve, give enough effort, while noting the evidence cannot yet pin down exact targets.
• Rest length. Rests under and over 1 minute gave similar strength gains (2 reviews, 982 participants, quality 63 percent). For muscle size the evidence was too thin to say.
• Free weights or machines. Similar strength gains (1 review, 683 participants, quality 75 percent).
• Rep speed and time under tension. No difference for strength or muscle size.
• Time of day. Morning and evening training gave similar strength gains (2 reviews, 430 participants).
• Periodization. Planned cycles of load and volume made no difference to muscle size (4 reviews, 1,414 participants, quality 63 percent), and their effect on strength could not be determined.
• Training frequency for muscle size. With weekly sets held equal, training 1 day a week or more than 5 gave similar growth.
• Special set structures, unstable surfaces and blood flow restriction cuffs. None consistently changed results.

"Matters little" means these choices did not consistently change results in the reviews. They can still matter for comfort, safety and sticking with a program, which the authors call of paramount importance and outside the scope of the stand.

What this means for a home gym with a barbell and plates

The stand does not compare home gyms with commercial gyms, and it recommends no equipment brand. Its findings still point to a few things a home lifter can act on.

• Home training counts. Against no exercise, home-based resistance training improved strength (2 reviews, 892 participants, quality 50 percent), balance and muscular endurance. The reviews behind these findings studied home-based programs in healthy older adults, not barbell training specifically.
• Free weights are not a handicap. For strength, free weights and machines gave similar results in the one review that compared them.
• Every strength lever it found, apart from flywheel machines, works with a bar and plates: heavier loads of 80 percent of one-rep max or more, 2 to 3 sets, a full range of motion, at least 2 sessions a week, and the main lift done first. Our one rep max calculator estimates your max from a recent hard set and lists the training percentages, and the plate calculator loads the bar for each one.
• Progress when you want more. The stand says progression is not needed to get benefits, and that increasing the stimulus, through load, volume, training frequency, exercise choice or duration, is likely needed only for continued longer term progress.
• For muscle size, count weekly sets. Aim for 10 or more per muscle group. The authors suggest covering the major muscle groups as upper and lower body pushes and pulls, four groups in all, or six if upper body moves are split into horizontal and vertical, and say this can be met in each session or across the week.
• No need to grind. Sets near failure, around 2 to 3 reps in reserve, count as enough effort, and rest length did not change strength gains.
• Bands count too. Elastic band training improved strength and muscle size compared with no exercise.

Our own bars, stated plainly. We sell Signature Fitness 1 inch standard bars in 5, 6 and 7 ft, plates not included. The stand does not mention them, recommends no brand and does not compare bar types, and nothing on this page means ACSM endorses our products. A 1 inch standard bar is made for 1 inch plates; adapter sleeves exist that let 2 inch plates ride one at light loads, and we have not tested one on our bars. How much load a bar is built to carry is the limit to check before you plan heavy work; is a 1 inch barbell worth it covers that, and beginner barbell weights covers where to start each lift.

Who it applies to, and its limits

• Healthy adults only. People with a defined disease, including obesity, sarcopenia and frailty, were outside its scope. If you have a health condition, ask your clinician how it applies to you.
• Group averages, mostly from beginners. Most of the evidence comes from people new to lifting, and the authors say individual programs will need to depart from the findings at times.
• Variables, not whole programs. An overview of reviews can say whether one variable matters, but it cannot compare or rank whole programs.
• Evidence quality. The authors write that trials in this field are often small and of limited quality, and the same trial can appear in several reviews; they measured that overlap only for strength, where it was moderate.
• Safety. The stand calls resistance training safe for healthy adults of all ages, citing an analysis of more than 38,000 participants in which exercise did not raise the risk of serious adverse events.
• Disclosures. One author formerly served on the scientific advisory board of Tonal, a fitness equipment maker. The stand reports no other relevant conflicts and no specific funding for the work.

Common questions

How many sets per week does ACSM recommend?

For muscle size, 10 or more sets per muscle group a week. For strength, 2 to 3 sets per exercise in a session, at least twice a week.

Does ACSM still recommend 8 to 12 reps?

The 2026 stand gives no rep range for strength or muscle size. For strength it points to heavier loads, 80 percent of one-rep max or more; for muscle size, load made no difference from 30 to 100 percent of one-rep max. The 8 to 12 RM range was the 2009 stand's advice for novices.

How long should you rest between sets?

The 2026 stand sets no rest period: rests under and over 1 minute gave similar strength gains, and there was too little evidence for muscle size. The 2009 stand had advised 3 to 5 minutes for heavy strength work.

Is the 2026 stand for beginners?

It covers healthy adults from complete novices to experienced lifters, and most of its evidence comes from people new to lifting.

Sources

The 2026 stand is entry 2 on our list of the most cited strength training studies, ranked there by its 2009 version. New studies each week are on the research page.

Study records and abstracts come from PubMed. Courtesy of the U.S. National Library of Medicine. The full text was read on Europe PMC, where the stand is open access under a Creative Commons license that forbids changing it; this page summarizes it in our own words and reproduces none of its tables. This is general information, not medical advice. If a number here looks wrong, email support@basaltfitness.com; corrections are logged in our editorial policy.