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Sleep debt accumulates faster than you can repay it. Here is the evidence-based way to measure and recover.
Sleep debt is the cumulative difference between the sleep you need (typically 7–9 hours) and the sleep you get. A one-hour nightly shortfall becomes a seven-hour deficit across a week.
Sleep debt is the cumulative difference between the sleep you need (typically 7–9 hours) and the sleep you get. A one-hour nightly shortfall becomes a seven-hour deficit across a week.
You cannot fully repay debt in a single weekend. Add 1–2 extra hours per night across several nights, shift bedtime earlier in 15-minute steps, and protect a consistent wake time.
Mifflin MD, St Jeor ST, et al. Am J Clin Nutr. 1990 · Tanaka H, et al. J Am Coll Cardiol. 2001 · Morton RW, et al. Br J Sports Med. 2018 · Last updated Feb 2026.
Drafted with AI assistance, then edited and fact-checked by the Clinarix editorial team against the cited primary research. Educational information only — not medical advice. See our standards.