Purpose Sleep duration has emerged as a crucial factor
affecting body weight and feeding behaviour. The aim of
our study was to explore the relationship among sleep
duration, body composition, dietary intake, and quality of
life (QoL) in obese subjects.
Methods Body composition was assessed by DXA.
‘‘Sensewear Armband’’ was used to evaluate sleep duration.
SF-36 questionnaire was used to evaluate quality of
life (QoL). A 3-day dietary record was administered.
Subjects were divided into 2 groups: sleep
duration[and B300 min/day.
Results 137 subjects (105 women and 32 men), age:
49.8 ± 12.4 years, BMI: 38.6 ± 6.7 kg/m2, were enrolled.
Sleep duration was B300 min in 30.6 % of subjects.
Absolute and relative fat mass (FM) (40.5 ± 9 vs.
36.5 ± 9.1 kg; 40.2 ± 4.7 vs. 36.9 ± 5.6 %), and truncal
fat mass (19.2 ± 6.1 vs. 16.6 ± 5 kg; 38.6 ± 5.3 vs.
35.2 ± 5.5 %) were higher in subjects sleeping B300 min
when compared to their counterparts (all p.05),
whereas just a tendency towards a higher BMI was
observed (p = 0.077). Even though energy intake was not
different between groups, subjects sleeping B300 min
reported a higher carbohydrate consumption per day
(51.8 ± 5.1 vs. 48.4 ± 9.2 %, p = 0.038). SF-36 total
score was lower in subjects sleeping B300 min
(34.2 ± 17.8 vs. 41.4 ± 12.9, p = 0.025). Sleep duration
was negatively associated with FM (r = -0.25, p = 0.01)
and SF-36 total score (r = -0.31, p.001). The inverse
association between sleep duration and SF-36 total score
was confirmed by the regression analysis after adjustment
for BMI and fat mass (R = 0.43, R2 = 0.19, p = 0.012).
Conclusion Reduced sleep duration negatively influences
body composition, macronutrient intake, and QoL in obese
subjects
