Suboptimal sleep duration and inadequate physical activity are associated with increased waist circumference and central obesity risk in Chinese adults
In a large Chinese cohort (106,518 participants), both short (<7 h/day) and long (≥9 h/day) sleep durations were associated with higher waist circumference and increased risk of central obesity compared to optimal sleep (7-<9 h/day). Joint analyses showed that individuals with inadequate physical activity and short sleep had the highest waist circumference and central obesity risk.
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Suboptimal sleep duration and inadequate physical activity are associated with increased waist circumference and central obesity risk in Chinese adults The current body of evidence comprises 1 study. EvidenceHub rates the overall confidence at 34/100 (low).
The Claim
Suboptimal sleep duration and inadequate physical activity are associated with increased waist circumference and central obesity risk in Chinese adults
This conclusion is most relevant to: Chinese adults from the China-PAR project (106,518 participants, 175,373 observations).
What the Research Shows
The conclusion draws on 1 linked study. Highlights from the cited literature:
- ▸Joint Association of Sleep and Physical Activity with Central Obesity in Chinese Adults. (Biomedical and environmental sciences : BES, 2026) —
How It Works
The proposed biological pathway:
- ▸Suboptimal sleep duration disrupts metabolic and hormonal regulation
- ▸Inadequate physical activity reduces energy expenditure
- ▸Combined effects exacerbate abdominal fat accumulation
- ▸Result: Increased waist circumference and central obesity risk
Who Might Benefit
Evidence fit by population:
- ▸Chinese adults from the China-PAR project (106,518 participants, 175,373 observations)
Recommended Dose
N/A
Limitations & Caveats
Important context when interpreting this evidence:
- ▸Observational design cannot establish causality
- ▸Sleep duration was self-reported, which may introduce measurement bias
- ▸Potential residual confounding from unmeasured variables (e.g., diet, stress)
Frequently Asked Questions
What sleep duration is considered optimal for reducing central obesity risk?▼
The study found that 7 to less than 9 hours per day was associated with the lowest waist circumference and central obesity risk.
Can physical activity compensate for poor sleep in terms of obesity risk?▼
Yes, the study suggests that adequate physical activity can mitigate the detrimental effects of suboptimal sleep on central obesity.
What was the sample size of this study?▼
The study included 106,518 participants with 175,373 observations from the China-PAR project.
Is long sleep duration also harmful for central obesity?▼
Yes, sleeping 9 or more hours per day was associated with a higher waist circumference and increased risk of central obesity compared to optimal sleep.
References
- 1.Zhang YJ, Hu ML, Yang ZY, Li JX, Cao J, Chen JC, Liu FC, Huang KY, Li HF, Shen C, Hu DS, Liu XQ, Gu SJ, Yu L, Huang JF, Lu XF, Gu DF, Chen SF. “Joint Association of Sleep and Physical Activity with Central Obesity in Chinese Adults..” Biomedical and environmental sciences : BES, 2026. PMID: 42417231 DOI: 10.3967/bes2026.034