Physical activity in obese subjects with a high metabolic risk profile

Svendsen, M.; Halse, J.; Hustvedt, B. E.; Tonstad, S.
September 2011
International Journal of Body Composition Research;2011, Vol. 9 Issue 3, p73
Academic Journal
Objective: Data regarding measured physical activity levels and the association between physical activity (PA) and metabolic risk factors in severely obese subjects are sparse. Methods: We assessed PA pattern and examined the association between waist circumference, trunk fat, blood pressure, lipids, glucose and moderate intensity PA. Assessments were performed in 130 weight-stable subjects aged 24-64 years with BMI 36.4 ± 4.3 kg/m2 before weight loss was initiated. PA was continuously monitored with a position and movement recorder (ActiReg®) for a mean of 4 days and time spent on PA categorized as physical activity ratios (PAR) were calculated. Body composition was determined by DXA. Results: Prior to treatment, the subjects daily spent a mean ± SD of 1065 ± 107 min lying, standing and sitting (PAR 1.0-1.5), 348 ± 100 min strolling and walking (PAR 1.6-6.0), and 26 ± 17 min brisk walking and jogging (PAR >6.0). The time spent on brisk walking and jogging was inversely associated with total cholesterol (R2adj=0.056 [95% CI 0.013, 0.186], P=0.0161) and triglycerides (R2adj=0.080 [95% CI 0.027, 0.208], P=0.0039) in multivariate regression analyses. No associations were seen with the other risk factors. Discussion: Advice to increase physical activity further as part of a weight loss programme should consider baseline levels of PA.


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