Hargens TA, et al. - Researchers investigated how obstructive sleep apnea (OSA) influences physical activity (PA) measured via accelerometer in overweight-to-obese individuals having OSA (n=35) vs controls (n=24). Using the Epworth Sleepiness Scale and dual-energy X-ray absorptiometry, they evaluated daytime sleepiness and body composition, respectively. For a minimum of 4 and maximum of 7 days, including at least one weekend day, subjects wore an accelerometer (Actigraph GT3X+, Actigraph Corp., Pensacola, FL). Objective assessments revealed less physical activity among individuals screened as likely possessing OSA vs those without OSA. In terms of daytime sleepiness, body mass index, or percent fat, no group differences were identified. This suggested other mechanisms than obesity and sleepiness for this difference.