The purpose of this prospective study was to examine the effect of physical activity independent of obesity on metabolic risk factors. A total of 358 participants were recruited from the Department of Health Management of Chang Gung Medical Center. Physical activity was assessed using a 3-d activity record. Body-mass index (BMI) and metabolic risk factors were also assessed. Our findings demonstrate that an effect of obesity that was statistically independent of the levels of physical activity is associated with metabolic risk factors. Moreover, physical activity displayed inverse associations with triglycerides, and fasting plasma glucose and a positive association with HDL cholesterol. Those participants with time spent in moderate activity more than 0.5 h each day had significantly less risk of high fasting glucose. Significantly, these associations were independent of BMI.
Li is with the Dept of Health Care Management and Healthcare Databank Laboratory, Chang Gung University, Tao-Yuan, Taiwan. Liu and Lin are with the Division of Endocrinology and Metabolism, Dept of Internal Medicine, Chang Gung Memorial Hospital, Chang Gung University, Tao-Yuan, Taiwan.