MON-105 Sedentary Behavior and Light Physical Activity were Related with Percent Body fat in Elderly Type 2 Diabetes

Sedentary behavior (SB) has emerged as a new risk factor for cardiovascular accident. Percent body fat is a predictor of cardiovascular mortality. We investigated whether physical activity level or physical inactivity expressed as SB was related with percent body fat in type 2 diabetes. In this cross sectional study, we measured the duration of SB, light(LPA), moderate to vigorous physical activity(MVPA), total energy expenditure(TEE) and step counts using wireless activity tracker (fitbit HR®:FB) for 7 days in free-living condition, and also percent body fat (%BF) using body composition analyzer (Inbody®) from 120 smart phone user with T2D. The subjects were divided into exercise (Exe, n=68) and non-exercise group(nonExe, n=52) based on self-reports of whether or not the recommended exercises(30min/day, 3 days/week for 3 months) had been performed. Each variable was tested for normal distribution. Transformed SB (SBt) was by reflect and square root for normal distribution. Transformed LPA(LPAt) and transformed MVPA(MVPAt) was by logarithm. Participants were as follows: female, 59.2%; age, 59.3±8.4 years; BMI, 25.5±3.4kg·m(2); A1c; 7.6±1.2%, %BF; 30.4±7.1%. They spent SB for 15.7±3.7h/day, LPA for 4.4±1.7 h/day, MVPA for 0.9±0.8h/day. The %BF was related with SBt(β=-0.262, P<0.001) and LPAt(β=-0.297, P<0.001), but not with MVPAt after adjusted for age, and gender, and HbA1c. There was no significant difference in SB, LPA and MPA between self-reported exercise and non-exercise groups, but VPA was statistically significantly higher in the exercise group (P <0.001) and MVA in the MPA plus VPA group was also significantly higher (P = 0.003). A multiple linear regression was calculated to predict body fat percentage based on their age, gender, HbA1c, SB, and LPA. Participants’ predicted percent body fat was equal to 89.494-0.105(age)-13.047(gender)-0.507(HbA1C)-7.655(LPAt) (F(4, 64) = 62.929, p < 0.0001), with an R(2) of 0.785,where gender is coded as 1=Male, 2=Female, from multiple linear regression In conclusion, decreased body fat in elderly diabetic patients might be associated with reduced inactivity and increased light physical activity, but not with moderate or vigorous physical activity. It would be better to use the activity tracker to avoid sedentary behavior and make more light movements.