Rep Range Guide – Hypertrophy vs Strength

Rep ranges are the dials of training: they decide whether a set primarily builds maximal force, muscle size or endurance. Strength lives in 1–5 reps at 85–95% of your one rep max with long 3–5 minute rests; hypertrophy spans a wider 6–12 reps at 65–80% where each set accumulates 30–40 seconds of mechanical tension; muscular endurance trains 15+ reps at 60% or below. Worked example: with a 140 kg squat max, a strength block works triples at 125 kg (89%), a hypertrophy block runs 4×8 at 105–112 kg (75–80%) and an endurance phase uses sets of 15–20 at 84 kg (60%). All three ranges build some muscle — the choice is about emphasis, and RPE 7–9 keeps every option honest: stop sets with 1–3 reps in reserve rather than grinding to failure every time.

1. 1

   Enter your 1RM

   A tested or estimated max anchors all percentages

2. 2

   Pick your goal

   Strength, hypertrophy or endurance sets the range

3. 3

   Read your loads

   Working weights, rep targets and rest periods per goal

• 1

  Stay 1–3 reps from failure (RPE 7–9) on most sets

• 2

  Rest 3–5 minutes for strength, 1.5–3 for hypertrophy

• 3

  Change rep ranges across blocks, not within sessions

• Believing only the 8–12 range builds muscle — 5–30 reps work with effort

• Resting 60 seconds between heavy triples

• Chasing the pump with weights too light to tax fibers

• Switching rep schemes weekly before adaptation happens