Repeated-sprint exercise in hypoxia does not alter sleep quality in young male adults
In a crossover trial, ten healthy young men performed repeated-sprint exercise in hypoxia (FiO2 14.5%), normoxia (FiO2 20.9%), or no exercise (REST). Sleep quality measures (total sleep time, sleep efficiency, sleep latency, sleep stages) did not differ significantly among conditions, but heart rate was higher and HRV-derived pNN50 was lower during the first 90 minutes of sleep after exercise compared to REST.
This article is automatically generated from the structured evidence profile behind the claim above. Scores reflect the quality and quantity of available research, not clinical advice.
Repeated-sprint exercise in hypoxia does not alter sleep quality in young male adults The current body of evidence comprises 1 study, including 1 randomized controlled trial. EvidenceHub rates the overall confidence at 42/100 (low).
The Claim
Repeated-sprint exercise in hypoxia does not alter sleep quality in young male adults
This conclusion is most relevant to: Ten healthy young male adults.
What the Research Shows
The conclusion draws on 1 linked study. Highlights from the cited literature:
- ▸Repeated-sprint exercise in hypoxia does not alter sleep quality in young male adults. (European journal of applied physiology, 2026) —
How It Works
The proposed biological pathway:
- ▸Exercise in hypoxia may increase sympathetic activation during recovery
- ▸Higher sympathetic activity may elevate heart rate and reduce HRV (pNN50) during early sleep
- ▸These autonomic changes are transient and do not disrupt overall sleep architecture
- ▸Result: No significant change in sleep quality measures
Who Might Benefit
Evidence fit by population:
- ▸Ten healthy young male adults
Recommended Dose
N/A
Limitations & Caveats
Important context when interpreting this evidence:
- ▸Small sample size (n=10) limits generalizability
- ▸Only young male adults studied, not applicable to females or older populations
- ▸Single night assessment may not capture long-term effects
- ▸No subjective sleep quality measures (e.g., PSQI) reported
Frequently Asked Questions
Does repeated-sprint exercise in hypoxia affect sleep quality?▼
No, the study found no significant differences in total sleep time, sleep efficiency, sleep latency, or sleep stages between hypoxia, normoxia, and rest conditions.
What is the effect of hypoxia exercise on heart rate during sleep?▼
Heart rate was significantly higher during the first 90 minutes of sleep after hypoxia exercise (53 bpm) compared to rest (49 bpm), indicating increased autonomic arousal.
How does exercise in hypoxia affect heart rate variability during sleep?▼
pNN50, a measure of HRV, was significantly lower after both hypoxia (48.8%) and normoxia (50.4%) exercise compared to rest (58.3%), suggesting reduced parasympathetic activity in early sleep.
Is this study applicable to athletes or general population?▼
The study involved only ten healthy young males, so results may not generalize to females, older individuals, or those with sleep disorders.
References
- 1.Matsudo H, Natsui T, Brocherie F, Goto K. “Repeated-sprint exercise in hypoxia does not alter sleep quality in young male adults..” European journal of applied physiology, 2026. PMID: 42541537 DOI: 10.1007/s00421-026-06366-8