Learn fitness · Strength

How to build muscle.

Muscle grows when you train it hard enough, often enough, and eat and sleep well enough to recover. Here is what the evidence says about each part.

8 min readInteractiveUpdated November 2026

Weekly volume

The number of hard sets you do for a muscle each week is one of the strongest drivers of growth. Gains climb from a few sets a week up to roughly 10–20, then level off for most people.

Where your training sitsHard sets per muscle per week

Reps and effort

Loads from about 5 to 30 reps can all build muscle, as long as sets finish close to failure, usually within one to three reps of it. Moderate reps (6–15) are the most time-efficient for most people.

Rep ranges and what they do best

The basics that make it work

  1. Pick a few big lifts per muscleSquat or leg press, a hinge, a press, a row, a pull-down.
  2. Train each muscle about twice a weekSplitting volume across sessions keeps quality high.
  3. Add load or reps over timeProgressive overload is the signal to keep growing.
  4. Eat enough protein and sleep 7–9 hoursGrowth happens in recovery.
Key takeaways
  • 10–20 hard sets per muscle a week is a strong target
  • Finish sets 1–3 reps from failure
  • Progress the weight or reps over time
Sources
  1. Schoenfeld BJ, Ogborn D, Krieger JW. Dose-response relationship between weekly resistance training volume and increases in muscle mass. J Sports Sci, 2017.
  2. Schoenfeld BJ et al. Strength and hypertrophy adaptations between low- vs high-load resistance training. J Strength Cond Res, 2017.
  3. Refalo MC et al. Influence of resistance training proximity-to-failure on hypertrophy. Sports Med, 2023.
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