START WITH THE ANSWER
Is one set enough to make strength training worthwhile?
A single challenging set can be a useful starting point, especially compared with doing no resistance training. Multiple sets provide more work and can support larger adaptations, particularly when muscle growth is the priority. The useful dose depends on the outcome, exercise coverage, effort and ability to repeat the programme.
Four different knobs
A repetition is one complete movement cycle. A set is a group of repetitions performed before a rest. Load is the resistance moved; volume describes accumulated work, often counted as sets per muscle group per week. Three sets of eight and one set of twenty-four contain the same repetition count but different rest opportunities and fatigue patterns. Likewise, a lighter load moved many times is not the same task as a heavier load moved fewer times. Separating these variables makes a short programme understandable: it may save time by using fewer sets, fewer exercises or shorter rests, and each choice changes something different.
What the large comparison found
Currier and colleagues analysed resistance-training prescriptions in a network meta-analysis. The strength analysis included 178 studies and 5,097 participants; the muscle-size analysis included 119 studies and 3,364 participants. Every studied resistance-training category improved outcomes compared with no exercise. Higher-load programmes ranked well for strength, while multiple sets were prominent among effective hypertrophy options. Network rankings compare groups across a network of studies; they do not prove that the highest-ranked schedule is uniquely best for everyone. The practical signal is that participation creates an important initial gain, while load and volume help tune the outcome.
Strength, size and power are distinct goals
ACSM’s 2026 summary distinguishes heavier-load work for maximal strength, higher weekly volume for muscle growth, and moderate loads moved quickly during the lifting phase for power. Power means producing force quickly, not simply struggling with the heaviest possible object. These distinctions explain why two good programmes can look different. A person learning basic movements may prioritise repeatable technique and broad coverage; someone pursuing a sport may need more specific loading. Neither needs to judge the session by soreness. More sets add both training stimulus and time, so the extra work should serve an identified goal.
A compact session still needs coverage
For a learning exercise, compare two fictional sessions: five sets of one upper-body movement, or one set each of five complementary movements. Both contain five sets, yet they distribute work very differently. Mark which major muscles and skills each session includes. Then consider whether a second set would improve practice or whether adding a missing movement is the more relevant change. Keep the comparison concrete: an extra pulling exercise does not magically cancel all pressing, and a set of light rehearsal is not equivalent to a demanding work set. The point is to make each minute serve the intended capability.
What to take away
- One set can be useful; more sets are a goal-dependent tool.
- Count movement coverage as well as total sets.
CHECK YOUR UNDERSTANDING
Why is five sets not a complete description of a session?
Think it through, then reveal the explanation
It leaves out exercises, muscles, repetitions, load, effort and rest, all of which alter the task.
A learning question, not a health assessment. No answers are collected or saved.
Original material & reading scope
Review Currier et al. — Resistance training prescription: network meta-analysis
Bibliographic record and complete abstract retrieved through the public Europe PMC metadata API; not full text.
Checked 2026-09-21 · 2023
Open original source Lessons using this sourceOfficial guidance ACSM — 2026 Resistance Training Guidelines official summary
Official announcement text re-read; the underlying overview and infographic were not re-reviewed in this update.
Find it: The Clear Message and Further Takeaways. Official summary dated March 17, 2026; not the full Position Stand.
Checked 2026-10-11 · 2026
Open original source Lessons using this source