Abstract
Background
Subjects with severe obesity (BMI > 40 kg/m2) have worse physical function and sleep less than lean people (BMI 18.5–25 kg/m2).
Methods
In 554 subjects with severe obesity, we compared physical function in those with normal sleep duration (NSD, 6–9 h/night), short sleep duration (SSD, ≤ 6 h/night) and long sleep duration (LSD, ≥ 9 h/night).
Results
The mean (±SD) age and BMI were 43.1 (± 11.1) years and 50.9 ± 8.6 kg/m2 respectively. One hundred ninety-six (35.4%) were male. More subjects in the NSD group (n = 256) were able to ascend and descend a step 50 times than in the SSD group (n = 247) or the LSD group (n = 51, 75.5% vs 62.8% vs 56.9%, p = 0.002). A similar observation was made for step speed (0.45 ± 0.11 vs 0.43 ± 0.10 vs 0.40 ± 0.11 steps/s respectively, p = 0.001). NSD participants were less likely to have fallen in the preceding year compared to LSD participants (21.1% vs 39.2%, p = 0.007) and also reported less low back pain compared to SSD participants (60.8% vs 75.9%, p = 0.004).
Conclusions
In conclusion, abnormal sleep duration is associated with reduced physical function in non-elderly severely obese subjects. The effects of sleep hygiene interventions in this cohort warrant further assessment and may be beneficial to their physical function.
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Funding
This work was supported by grants provided by the Health Research Board of Ireland [HPF/2010/37 to TA] and by the Irish Heart Foundation [0993704 to TA].
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Ahern, T., O’Malley, E., Dunlevy, C. et al. Sleep duration and physical function in people with severe obesity: a prospective cross-sectional study. Ir J Med Sci 189, 517–523 (2020). https://doi.org/10.1007/s11845-019-02110-8
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DOI: https://doi.org/10.1007/s11845-019-02110-8