Health & recovery
Sleep and muscle recovery: the factor you most underestimate
Poor sleep cuts strength, raises hunger and slows recovery. It is the free variable with the biggest impact on your results.
If you could only improve one thing outside the gym, it would be sleep. Chronically restricting to 5-6 hours lowers strength and power, raises perceived effort, disrupts appetite hormones and, in a calorie deficit, shifts part of your weight loss from fat towards lean mass.
What happens when you sleep too little
- Testosterone drops and morning cortisol rises under sustained restriction.
- Ghrelin rises and leptin falls: more hunger, less satiety.
- Motor control worsens, raising the risk of technique-related injury.
- Training quality drops: fewer reps at the same load.
How much you need
| Profile | Recommended hours | Note |
|---|---|---|
| Sedentary adult | 7-9 h | General health range |
| Training 4-6 days/week | 7.5-9 h | More volume, more need |
| In a calorie deficit | 8-9 h | Protects lean mass |
| Adolescents | 8-10 h | Higher physiological need |
A practical 5-step routine
- Fixed wake time, weekends included: it anchors the whole circadian rhythm.
- Natural light in your first hour awake and dim light in the last two.
- No caffeine 8-10 hours before bed; its half-life is 5-6 hours.
- Cool bedroom (18-20 °C), dark and quiet.
- A 30-minute wind-down: shower, reading, gentle stretching.
Naps work
A 20-30 minute nap recovers part of the deficit without hurting night sleep. If you nap longer than 45 minutes, do it before 3pm to avoid grogginess and a delayed night.
What actually helps you sleep
A blackout eye mask, silicone earplugs and blackout curtains have more real impact than most sleep supplements.
See sleep gear
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Talk to a professional
Loud snoring with breathing pauses, heavy daytime sleepiness or insomnia lasting more than three weeks needs medical assessment: it can indicate sleep apnoea or another treatable disorder.
Frequently asked questions
- Does melatonin help?
- It is mainly useful for jet lag and shifting sleep phase, at low doses (0.5-1 mg). It is not a sedative.
- Is training at night worse than not training?
- Training almost always wins. Just avoid very intense sessions in the hour before bed.
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