Pattinson Cassandra L, Allan Alicia C, Staton Sally L, Thorpe Karen J, Smith Simon S
Centre for Children's Health Research, Institute for Health and Biomedical Innovation, Queensland University of Technology, Kelvin Grove, Queensland, Australia.
Centre for Accident Research and Road Safety - Queensland (CARRS-Q), Queensland University of Technology, Kelvin Grove, Queensland, Australia.
PLoS One. 2016 Jan 6;11(1):e0143578. doi: 10.1371/journal.pone.0143578. eCollection 2016.
The timing, intensity, and duration of exposure to both artificial and natural light have acute metabolic and physiological effects in mammals. Recent research in human adults suggests exposure to moderate intensity light later in the day is concurrently associated with increased body mass; however, no studies have investigated the effect of light exposure on body mass in young children. We examined objectively measured light exposure and body mass of 48 preschool-aged children at baseline, and measured their body mass again 12 months later. At baseline, moderate intensity light exposure earlier in the day was associated with increased body mass index (BMI). Increased duration of light exposure at baseline predicted increased BMI 12-months later, even after controlling for baseline sleep duration, sleep timing, BMI, and activity. The findings identify that light exposure may be a contributor to the obesogenic environment during early childhood.
哺乳动物接触人造光和自然光的时间、强度及持续时间会产生急性代谢和生理影响。近期针对成年人类的研究表明，在一天中较晚时段接触中等强度光线与体重增加同时存在关联；然而，尚无研究调查光照对幼儿体重的影响。我们在基线时客观测量了48名学龄前儿童的光照情况和体重，并在12个月后再次测量了他们的体重。在基线时，一天中较早时段的中等强度光照与体重指数（BMI）增加有关。即使在控制了基线睡眠时间、睡眠时间、BMI和活动量之后，基线时光照持续时间的增加仍预示着12个月后BMI会增加。这些发现表明，光照可能是幼儿期致肥胖环境的一个促成因素。
