Key facts
- One full lift-and-lower cycle.
- Reps are grouped into sets.
- Rep range influences the training adaptation.
- Quality reps with good form beat sloppy ones.
A rep is the basic unit of resistance training — one full movement through an exercise, such as lowering into a squat and standing back up. Reps are grouped into sets, and how many you do per set shapes the adaptation: lower reps with heavy loads favor strength, moderate reps favor muscle growth.
What counts is the quality of each rep, not just the number. Controlled, full-range reps with good technique deliver more useful stimulus than partial, bouncy reps done to inflate the count. Tracking reps (along with weight and sets) is how you apply progressive overload.
Frequently asked questions
How many reps should I do per set?
It depends on the goal: roughly 1–6 reps for strength, 6–15 for muscle growth, and higher reps for endurance. Quality and effort matter across all ranges.
Do reps need to be slow?
They should be controlled, not necessarily slow. A deliberate lowering phase and a non-bouncy lift make each rep more effective than rushing through them.
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