Shorter Sleep Durations May Increase Genetic Risks for Obesity
ScienceDaily (June 17, 2011) — Sleeping less at night may increase the expression of genetic risks for obesity, while getting plenty of sleep may suppress genetic influences on body weight, suggests an abstract being presented in Minneapolis, Minn., at SLEEP 2011, the 25th Anniversary Meeting of the Associated Professional Sleep Societies LLC (APSS).
Results of a study of 1,811 pairs of twins show that the heritability of sleep duration was 32 percent, and shared environmental influences on sleep duration were negligible. Longer sleep duration was associated with decreased body mass index, which is a measure of body fat based on height and weight.
Behavioral genetic modeling found significant interactions between self-reported, habitual sleep duration and both genetic and shared environmental influences on BMI.
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