Know exactly when your phosphocreatine is recovered and you're ready for the next deadlift set — backed by exercise science.
Select your training goal and start the timer after each deadlift set.
Training goal
Heavy deadlifts (1-5 reps) need near-complete ATP recovery for max force output.
Rest duration
Recommended for strength / power: 3:00 – 5:00
3:00
ready
ATP recovered
0%
Not recovered — wait longer
Coaching insight
Complete your deadlift set and start the timer. The readiness indicator will guide you.
Goal
Strength / Power
Target rest
3:00
ATP target
90-100%
Core concept
Deadlifts demand more recovery between sets than almost any other exercise. Understanding why helps you train smarter.
The deadlift recruits more total muscle mass than virtually any other barbell exercise — hamstrings, glutes, erectors, lats, traps, grip, and core all contribute to the pull. This massive recruitment creates a dual fatigue effect: local muscular ATP depletion and systemic central nervous system (CNS) fatigue [2].
For heavy sets (1-5 reps at 85%+ of 1RM), your muscles rely almost entirely on the ATP-PCr (phosphocreatine) energy system. This system provides immediate explosive energy but depletes within about 10 seconds of maximal effort. Recovering that phosphocreatine is the primary bottleneck between heavy deadlift sets [1].
Choose strength, hypertrophy, or endurance to get a goal-specific rest recommendation.
Hit start immediately after completing your deadlift set. The timer counts up while tracking ATP recovery.
The readiness indicator changes from red to amber to green as your phosphocreatine stores replenish. Go when ready.
Exercise science
The timer uses a half-life kinetics model to estimate real-time phosphocreatine replenishment.
After a heavy deadlift set, phosphocreatine resynthesis follows a predictable half-life curve. The half-life is approximately 30 seconds — meaning half your PCr recovers every 30 seconds [1].
| Rest time | PCr recovered | Implication |
|---|---|---|
| 30 sec | ~50% | Minimal — avoid starting next heavy set |
| 1 min | ~75% | Partial — acceptable for hypertrophy |
| 1:30 | ~87% | Good — suitable for moderate loads |
| 2 min | ~94% | Near-complete — ready for heavy work |
| 3 min | ~98% | Near-complete — ready for heavy work |
| 5 min | ~100% | Full — maximal force output available |
The timer calculates recovery using the formula: recovery = 1 − 0.5^(t / halfLife), where the half-life defaults to approximately 30 seconds. This is a well-established kinetic model in exercise physiology [1].
Individual variation exists: more aerobically fit athletes tend to have faster PCr resynthesis (shorter half-life), while less conditioned lifters or older athletes may recover more slowly. The 30-second half-life is the standard textbook midpoint.
Training goals
The optimal rest interval depends entirely on what you're training for. These guidelines are from the NSCA.
| Goal | Rep range | Rest period | ATP target | Why |
|---|---|---|---|---|
| Strength / Power | 1-5 reps | 3-5 min | 90-100% | Near-complete ATP recovery for maximal force |
| Hypertrophy | 6-12 reps | 60-120 sec | 70-85% | Incomplete recovery drives metabolic stress |
| Muscular Endurance | 12+ reps | 30-60 sec | 50-70% | Build work capacity under fatigue |
Guidelines adapted from NSCA Essentials of Strength Training and Conditioning, 4th ed. [2]
While ATP recovery is measurable and predictable, central nervous system (CNS) fatigue is harder to quantify. Deadlifts — especially heavy singles and doubles — create significant CNS fatigue that can persist beyond the point of full PCr recovery.
Practical implication: for maximal singles above 95% of 1RM (e.g., competition attempts or testing), you may want to rest 5-8 minutes even though your muscles feel ready at 3 minutes. The timer shows your muscular readiness; trust your subjective feel for CNS readiness.
Practical advice
Evidence-based tips for optimizing your rest between deadlift sets.
Rest 3-5 minutes between working sets. This ensures 95%+ ATP recovery and allows your nervous system to reset. If your next set feels sluggish despite full rest, your overall session volume may be too high.
For lighter supplemental work (like FSL or BBB templates in 5/3/1), 90-120 seconds is usually sufficient. These sets don't demand maximal motor unit recruitment, so partial ATP recovery is acceptable [3].
Warm-up sets at 40-60% need only 60-90 seconds of rest. The purpose is movement preparation, not maximal effort. Longer rest during warm-ups can actually cool you down.
Testing true 1RM or competition attempts: rest 5-8 minutes. This mirrors powerlifting competition flight timing and ensures both muscular and neural readiness.
FAQ
Common questions about deadlift rest intervals, ATP recovery, and the science behind the timer.
Related tools
Use these tools alongside the rest timer for a fully optimized deadlift workout.
Live tool
Track total tonnage across your deadlift session.
Live tool
Gauge intensity and estimate rep maxes by RPE.
Live tool
Plan warm-up sets before your working sets.
Live tool
Generate a complete 5/3/1 deadlift program.
Live tool
Estimate your one-rep max from submaximal sets.
References
Research supporting the ATP recovery model and rest period recommendations.
[1] Creatine Phosphate Restoration Kinetics: The Math of Recovery
Rest Timer Science. 2025.
PCr half-life model (~30s), recovery curve mathematics, and the 98% rule for strength training.
[2] Essentials of Strength Training and Conditioning (4th ed.)
Haff GG, Triplett NT. Human Kinetics. 2016.
NSCA rest period guidelines: strength 3-5 min, hypertrophy 30-90 sec, endurance ≤30 sec.
[3] A Brief Review: How Much Rest Between Sets?
de Salles BF, et al. Strength Cond J. 2008.
Systematic review of rest interval research for resistance training across goals.