Rest Time Between Sets Calculator
How long should you rest between sets? Choose your goal, exercise type and effort, and get a recommended rest time plus a built-in timer to keep your workout on track.
Rest times vary by physiological training goal: 3 to 5 minutes for maximal strength and power, 1.5 to 3 minutes for muscle hypertrophy, and 30 to 90 seconds for muscular endurance. Compound lifts require 30 seconds more rest than isolation exercises.
Recommended Rest Period
HYPERTROPHY PROTOCOLTarget: 2m 30s. Muscle hypertrophy thrives on 1.5 to 3 minutes of rest. Research confirms longer rest produces superior total volume and muscle growth compared to rushed short intervals.
Evidence-Based Rest Guidance (Schoenfeld & ACSM)
Strength & Power (3–5 min): Allows full replenishment of intra-muscular creatine phosphate (PCr). Cutting rest too short significantly decreases volume and load capacity in later sets.
Hypertrophy (1.5–3 min): Recent sports science meta-analyses demonstrate that resting 2+ minutes yields greater muscle hypertrophy than 60-second rest intervals because lifters maintain higher mechanical tension and volume load.
Endurance (30–90 sec): Keeps heart rate elevated and challenges cellular buffering capacity against hydrogen ion accumulation.
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Clinical Equations
WHO, CDC, ACSM & Mifflin-St Jeor
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How to use Rest Time Calculator
- 1Select your primary training focus: Strength, Hypertrophy, Endurance, or Power.
- 2Choose your exercise type: Compound or Isolation.
- 3Review your optimal rest interval and use the built-in interval timer.
Why rest periods matter for muscle growth
Research in sports science has overturned the old dogma of short 60-second rest for hypertrophy. Longer rest (2–3 minutes) allows full neuromuscular recovery, leading to greater training volume and superior muscle growth.
Frequently Asked Questions
How long should I rest between sets for muscle growth?
About 1.5 to 3 minutes; recent research suggests longer rest supports more volume and growth.
How long to rest for strength?
3 to 5 minutes between heavy sets.
Is 30 seconds rest enough?
For endurance or circuit work, yes; for heavy lifting, it usually reduces performance.
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Scientific Sources & Evidence
- World Health Organization (WHO) — Body Mass Index Classification
- CDC Growth Charts — BMI-for-age LMS Percentiles
- Mifflin et al. (1990) — Basal Metabolic Rate Predictive Equations
- NICE Guideline NG246 — Identification and Management of Overweight and Obesity
- American College of Sports Medicine (ACSM) — Exercise Testing & Prescription
- European Food Safety Authority (EFSA) — Dietary Reference Values for Water