Go Back   Olympic Weightlifting Forums - Catalyst Athletics > Olympic Weightlifting > Nutrition

Thread Tools Display Modes
Old 10-21-2009, 06:30 AM   #1
Darryl Shaw
Senior Member
Join Date: Apr 2008
Posts: 681
Default Effects of a popular exercise and weight loss program on obese women.

Effects of a popular exercise and weight loss program on weight loss, body composition, energy expenditure and health in obese women.

Objective: To determine the safety and efficacy of altering the ratio of carbohydrate and protein in low-energy diets in conjunction with a popular exercise program in obese women.

Design: Matched, prospective clinical intervention study to assess efficacy of varying ratios of carbohydrate and protein intake in conjunction with a regular exercise program.

Participants: One-hundred sixty one sedentary, obese, pre-menopausal women (38.5 ± 8.5 yrs, 164.2 ± 6.7 cm, 94.2 ± 18.8 kg, 34.9 ± 6.4 kg·m-2, 43.8 ± 4.2%) participated in this study. Participants were weight stable and not participating in additional weight loss programs.

Methods:Participants were assigned to either a no exercise + no diet control (CON), a no diet + exercise group (ND), or one of four diet + exercise groups (presented as kcals; % carbohydrate: protein: fat): 1) a high energy, high carbohydrate, low protein diet (HED) [2,600; 55:15:30%], 2) a very low carbohydrate, high protein diet (VLCHP) [1,200 kcals; 63:7:30%], 3) a low carbohydrate, moderate protein diet (LCMP) [1,200 kcals; 50:20:30%] and 4) a high carbohydrate, low protein diet (HCLP) [1,200 kcals; 55:15:30%]. Participants in exercise groups (all but CON) performed a pneumatic resistance-based, circuit training program under supervision three times per week.

Measurements: Anthropometric, body composition, resting energy expenditure (REE), fasting blood samples and muscular fitness assessments were examined at baseline and weeks 2, 10 and 14.

Results: All groups except CON experienced significant reductions (P < 0.05 – 0.001) in waist circumference over 14 weeks. VLCHP, LCHP and LPHC participants experienced similar but significant (P < 0.05 – 0.001) reductions in body mass when compared to other groups. Delta responses indicated that fat loss after 14 weeks was significantly greatest in VLCHP (95% CI: -5.2, -3.2 kg), LCMP (-4.0, -1.9 kg) and HCLP (-3.8, -2.1 kg) when compared to other groups. Subsequent reductions in % body fat were significantly greater in VLCHP, LCMP and HCLP participants. Initial dieting decreased (P < 0.05) relative REE similarly in all groups. All exercise groups significantly (P < 0.05) improved in muscular fitness, but these improvements were not different among groups. Favorable but non-significant mean changes occurred in lipid panels, glucose and HOMA-IR. Leptin levels decreased (P < 0.05) in all groups, except for CON, after two weeks of dieting and remained lower throughout the 14 week program. Exercise participation resulted in significant improvements in quality of life and body image.

Conclusion: Exercise alone (ND) appears to have minimal impact on measured outcomes with positive outcomes apparent when exercise is combined with a hypoenergetic diet. Greater improvements in waist circumference and body composition occurred when carbohydrate is replaced in the diet with protein. Weight loss in all diet groups (VLCHP, LCMP and HCLP) was primarily fat and stimulated improvements in markers of cardiovascular disease risk, body composition, energy expenditure and psychosocial parameters.
Darryl Shaw is offline   Reply With Quote
Old 10-21-2009, 09:31 PM   #2
Paul Epstein
New Member
Join Date: May 2009
Posts: 39

thanks. mirrors my expeirience.

1200 calories seems so low tho.
Paul Epstein is offline   Reply With Quote
Old 10-23-2009, 11:03 AM   #3
Mike ODonnell
Senior Member
Mike ODonnell's Avatar
Join Date: Nov 2006
Posts: 3,560

Originally Posted by Paul Epstein View Post
thanks. mirrors my expeirience.

1200 calories seems so low tho.
Zone base perscriptions are lower......sometimes 800-1000 for women.
Fitness Spotlight
The IF Life
Mike ODonnell is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

All times are GMT -7. The time now is 12:11 PM.

Powered by vBulletin® Version 3.8.9 Beta 3
Copyright ©2000 - 2016, vBulletin Solutions, Inc.