Recovery · Limited evidence
Monitoring recovery
Recovery should be tracked using simple, frequent measures such as perceived exertion, sleep, and mood; heart rate variability works better as a weekly trend than as a single daily figure.
Expert consensus and review · 2 sources · 2 min
What the studies show
- The consensus recommends combining subjective and objective measures and acting on trends, rather than an isolated data point.
- Weekly HRV averages tracked training adaptation better than daily values.
- Recovery encompasses sleep, nutrition, stress, and active rest.
How Letz applies it
The Letz readiness reading is a tiered heuristic that combines sleep, soreness, recent load, and mood, with declared confidence.
Who it applies to
Active individuals who log workouts and daily metrics.
Limits
No single marker defines recovery; single-day HRV is noisy and device-dependent.
Sources
- Kellmann et al., International Journal of Sports Physiology and Performance, 2018 DOI 10.1123/ijspp.2017-0759
- Plews et al., Sports Medicine, 2013 DOI 10.1007/s40279-013-0071-8
More in Recovery
- Sleep, recovery, and performanceSleep interventions may be accompanied by improvements in recovery and certain performance outcomes.
- How Much to SleepAdults should sleep 7 to 9 hours per night; sleeping less was associated with more injuries in young athletes.
- Sleep and Fat LossSleeping too little during a deficit shifts fat loss toward lean mass loss and increases intake; extending sleep reduced intake by about 270 kcal per day.
- Training load does not predict individual injuryRecent training load can provide context for workout decisions, but simple load ratios do not support reliable individual injury prediction.