Effects of high carbohydrate or high protein energy-restricted diets combined with resistance-exercise on weight loss an
- PDF / 169,371 Bytes
- 2 Pages / 595.276 x 793.701 pts Page_size
- 30 Downloads / 201 Views
POSTER PRESENTATION
Open Access
Effects of high carbohydrate or high protein energy-restricted diets combined with resistanceexercise on weight loss and markers of health in women with serum triglyceride levels above or below median values Jonathan M Oliver1*, Julie Y Kresta1, Mike Byrd1, Claire Canon1, Michelle Mardock1, Sunday Simbo1, Peter Jung1, Brittanie Lockard1, Deepesh Khanna1, Majid Koozehchian1, Chris Rasmussen1, Chad Kerksick2, Richard Kreider1 From International Society of Sports Nutrition; 7th Annual ISSN Conference and Expo Clearwater Beach, FL, USA. 24-26 June 2010 Background A diet high in protein has been shown to have beneficial effects on weight loss and triglyceride (TG) levels when combined with exercise. Recent research has also shown that a diet high in protein in the absence of exercise promotes more favorable results for individuals above the median TG (mTG) levels (>133 mg/dL). The purpose of this study was to determine if women with TG above median values experience greater benefits to a diet and circuit resistance-training program. Methods 442 apparently healthy sedentary obese women (48±12 yrs, 64±3 in, 201±39 lbs, 45±5 % fat) completed a 10-wk exercise and diet program. All subjects participated in Curves circuit training (30-minute hydraulic resistance exercise interspersed with recovery floor calisthenics performed at 30-seconed intervals 3 days/wk) and weight loss program (1,200 kcal/d for 1 wk; 1,600 kcal/d for 9 wks). Subjects were randomly assigned to a high protein or high carbohydrate isocaloric diet. The high protein (HP) group (n=200) consumed 30% fat, 55-63% protein, and 9-15% carbohydrate diet while the high carbohydrate (HC) group (n=242) consumed 30% fat, 55% carbohydrate, and 15% protein diet. Pre and post measurements included standard anthropometric 1
Exercise and Sports Nutrition Laboratory, Texas A & M University, College Station, TX, USA Full list of author information is available at the end of the article
measurements including dual energy X-ray absorptiometry (DEXA), as well as resting energy expenditure (REE), metabolic blood analysis, and blood pressure. Subjects were stratified into a lower or higher TG group based on the mTG value observed (125 mg/dL). Data were analyzed by MANOVA with repeated measures and are presented as means ± SD percent changes from baseline.
Results Fasting serum TG levels differed between groups stratified based on mTG levels (mTG 204 ±84 mg/dL, p=0.001). Time effects were observed in all anthropometric measurements including waist and hip, as well as weight loss, fat mass and percent body fat. Subjects on the HP diet experienced greater reductions in weight than those on the HC diet (HP -3.1±3.4%; HC -2.3±2.5%, p=0.005) and fat mass (HP -1.7±3.1%; HC -1.3±2.0%, p=0.006). No differences were seen in any measures in subjects with > mTG. However, a Time x Diet x mTG interaction was observed in changes in hip circumference. Subjects in the HP diet with mTG levels (-2.4 ± 4.8%, p=0.029) while subjects in the HC diet with >mTG experie
Data Loading...
