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This study aims to evaluate the outcome of a 12-week behavioral lifestyle modification program focusing on the blood oxidative stress levels/activities in obese subjects and aims to examine the association between the changes in blood oxidative stress levels/activities and modifications in serum lipid profile concentrations. An interventional study was conducted involving thirty-four obese adults, all of whom were recruited from the Obesity Clinic, Hospital Universiti Sains Malaysia. The subjects participated in the 12-week behavioral lifestyle modification program consisting of diet and exercise interventions. Blood was obtained from the subjects at baseline (week 0) and after 12 weeks (week 13) for the determination of oxidative stress levels/activities and lipid profile concentrations. Plasma glutathione peroxidase (GPx) activity and 4-hydroxynonenal (4-HNE) level increased significantly, and the ratio of reduced glutathione (GSH) to oxidized glutathione (GSSG) was decreased following 12-week interventions. Other enzymatic antioxidant activities such as catalase (CAT) and superoxide dismutase (SOD) were increased, but the changes were not statistically significant. Changes in plasma GPx activity were negatively correlated with changes in serum triglyceride (TG) and VLDL-cholesterol concentrations. In conclusion, diet and exercise interventions in the 12-week behavioral lifestyle modification program were effective in increasing antioxidant enzyme activities in obese adults.

12-Week Behavioral Lifestyle Modification Program Increases Blood Antioxidant Enzyme Activities in Obese Adults