Sleep quality does not significantly affect cardiorespiratory fitness (VO2 max) in apparently healthy young adults
This cross-sectional study compared VO2 max between normal and poor sleep categories in young medical students. Mean VO2 max was 42.50 mL/kg/min for normal sleepers and 41.89 mL/kg/min for poor sleepers, with no significant difference (p=0.77). No correlation was found between PSQI score and VO2 max (r=0.029, p=0.591).
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Sleep quality does not significantly affect cardiorespiratory fitness (VO2 max) in apparently healthy young adults The current body of evidence comprises 1 study. EvidenceHub rates the overall confidence at 32/100 (low).
The Claim
Sleep quality does not significantly affect cardiorespiratory fitness (VO2 max) in apparently healthy young adults
This conclusion is most relevant to: Apparently healthy young adults (medical students, 45 males, 19 females).
What the Research Shows
The conclusion draws on 1 linked study. Highlights from the cited literature:
- ▸Effect of Sleep on Cardiorespiratory Fitness of Apparently Healthy Young Adults. (Journal of Nepal Health Research Council, 2026) —
How It Works
The proposed biological pathway:
- ▸Sleep quality assessed using PSQI score
- ▸Participants categorized into normal (PSQI < 5) and poor (PSQI ≥ 5) sleep groups
- ▸VO2 max measured after Queen's College step test
- ▸No significant difference or correlation found between sleep quality and VO2 max
Who Might Benefit
Evidence fit by population:
- ▸Apparently healthy young adults (medical students, 45 males, 19 females)
Recommended Dose
N/A
Limitations & Caveats
Important context when interpreting this evidence:
- ▸Cross-sectional design limits causal inference
- ▸Small sample size (n=64) and single-center recruitment
- ▸VO2 max estimated from step test rather than direct measurement
- ▸Potential confounding factors (e.g., physical activity, BMI) not controlled
Frequently Asked Questions
What is the relationship between sleep quality and VO2 max in young adults?▼
This study found no significant relationship between sleep quality (measured by PSQI) and VO2 max in apparently healthy young adults.
What was the mean VO2 max for normal and poor sleepers?▼
Normal sleepers had a mean VO2 max of 42.50 mL/kg/min, while poor sleepers had 41.89 mL/kg/min, with no significant difference.
How was sleep quality measured in this study?▼
Sleep quality was measured using the Pittsburgh Sleep Quality Index (PSQI) score, with participants categorized into normal and poor sleep groups.
What is the sample size and population of this study?▼
The study included 64 participants (45 males, 19 females) who were apparently healthy young medical students.
References
- 1.Kandel S, Mahotra NB, Shrestha L, Bajimaya MM, Aryal V. “Effect of Sleep on Cardiorespiratory Fitness of Apparently Healthy Young Adults..” Journal of Nepal Health Research Council, 2026. PMID: 42638259 DOI: 10.33314/jnhrc.v24i01.4730