RECOVERY

Sleep and Vertical Jump: The Lever You're Ignoring

Sleep below 7 hours cuts strength 10–15%. Here is the evidence and a practical protocol for sleep that actually improves jumping.

August 5, 20266 min read

No supplement, program or coach cue matters as much as sleep if you are under-rested. It is the most underrated lever in jump training because it sits underneath everything else: strength, skill, motivation and injury risk.

What the evidence says

The numbers are hard to argue with:

Under 6 hours of sleep drops strength output 10–15%.
Sleep deprivation lowers testosterone, slowing muscle repair and growth.
REM sleep is a key window for motor-skill consolidation — including jump technique.
A Stanford basketball study showed that extended sleep (8+ hours) improved sprint speed and shooting accuracy.

How to optimize sleep

A practical protocol, in order of impact:

Fixed bed and wake times within 30 minutes, every day.
No screens for 1 hour before bed — blue light suppresses melatonin.
A completely dark bedroom at 18–20°C.
A warm shower before bed (40°C × 15 min); the core cooling afterward induces sleep.
Avoid caffeine 5–6 hours before bed and heated discussions late at night.

How much is enough

Most athletes need 7–9 hours. If your jump tests are flat while training is on point, check sleep first — it is cheaper and more reliable than any training change.

Key takeaways

Sleep under 6 hours costs 10–15% of strength output.
Fixed schedule, dark cool room and no late screens are the highest-impact fixes.
When progress stalls, audit sleep before changing the program.

References

Reilly & Edwards (2007) Sports Med
Leproult & Van Cauter (2011) JAMA
Mah et al. (2011) Sleep

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