- Adolescents who get efficient and sufficient sleep have better cardiometabolic profiles regardless of other activities that might promote obesity.
- These children have lower abdominal adiposity and systolic BP and better high-density lipoprotein cholesterol values.
Why this matters
- Few children meet the threshold for recommended sleep duration set by the National Sleep Foundation.
- For every 55 minutes of sleep, adiposity decreased based on:
- BMI z score (−0.15; 95% CI, −0.26 to −0.05 per interquartile range [IQR]);
- Sum of skinfold thicknesses: −2.05 (95% CI, −3.43 to −0.68) mm;
- Dual-energy radiograph absorptiometry (DXA) fat mass index (−0.52 kg/m2; 95% CI, −0.89 to −0.15 kg/m2); and
- DXA trunk fat mass index (−0.26; 95% CI, −0.43 to −0.08 kg/m2).
- Sleep efficiency showed similar associations with adiposity measures.
- With longer sleep duration and higher efficient sleep, metabolic risk scores fell:
- −0.11 (95% CI, −0.19 to −0.02) points per IQR; and
- −0.08 (95% CI, −0.16 to −0.01) points, respectively.
- Cross-sectional study of 829 adolescents (mean age, 13.2 years; 51.5% girls).
- Median sleep duration, 441.1 (IQR, 54.8) minutes/day.
- Median sleep efficiency, 84.0% (IQR, 6.3).
- Main outcome: metabolic risk score.
- Funding: National Institute of Child Health and Human Development, others.
- Study design, gold-standard polysomnography not used.