Abstract P289: Physical Activity and Sedentary Behavior in Metabolically Healthy Obese Young Women
Purpose: Studies of physical activity (PA) and sedentary behavior (SB) in metabolically healthy obese (MHO) have been limited to postmenopausal white women. We sought to determine whether PA and SB differ between MHO and metabolically abnormal obese (MAO), in young black and white women.
Methods: Project Health included 46 overweight/obese (BMI ≥25 kg/m^2) women 19-35 years. Women were classified as MAO (≥2 abnormal cardiometabolic risk factors) or MHO (<2) based on: blood pressure ≥130/85 mmHg; triglycerides ≥150 mg/dL; HDL-C <50 mg/dL; glucose ≥100 mg/dL; CRP ≥90th %tile; HOMA-IR ≥90th %tile). PA and SB were estimated with accelerometry (≥3 days of ≥8 hrs wear time) with count/min thresholds to define time spent in SB, light PA (LPA), moderate PA (MPA) and vigorous PA (VPA) of 0-99; 100-759; 760-5998; ≥5999, respectively. Questionnaires quantified sleep, sitting time, TV/computer use and usual daily activity (UDA). Adjusting for age, race, BMI, smoking status and accelerometer wear time, differences between MHO and MAO for PA and SB were tested with linear regression and categories for computer/TV time or UDA were assessed by logistic regression.
Results: Women were 61% black, 26.7 ± 4.7 years, with a mean BMI of 31.1 ± 3.7 kg/m^2. On average, accelerometers were worn for 7.0 ± 2.0 days and 832.6 ± 103.5 min/day. Compared to MAO, MHO (n=37; 80%) spent significantly less time per day in SB, and more time per day in LPA, and had higher daily METs (Table). There were no significant differences between MHO and MAO for time spent in MPA, VPA or MVPA, total activity counts, steps/day, sleep, sitting time, or in distribution of categories for TV/computer time, or UDA (Table).
Conclusion: Compared to MAO, MHO have lower levels of SB and greater overall energy expenditure. Although between-group differences for some outcomes did not reach statistical significance, the trends suggest clinically meaningful effects, which warrant larger studies.
Author Disclosures: S.M. Camhi: None. S.E. Crouter: None. L.L. Hayman: None. A.H. Lichtenstein: None. A. Must: None.
- © 2015 by American Heart Association, Inc.