NCT01186536

Whey Protein, Resistance Training, and Changes in Body Composition

Whey Protein Supp. w/ Resistance Training; Effects on Body Comp. of Young Adults.

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 85 (actual)
• Sponsor: University of Kansas · Academic / Other
• Sex: All
• Age: 18 Years – 30 Years
• Healthy volunteers: Accepted

Summary

The objective of this project is to determine the effect of 9 months of progressive resistance training with daily whey protein supplements on the body composition (changes in muscle and fat) in young adults. The investigators hypothesize that those individuals who receive whey protein supplements will have larger gains in muscle and larger losses of fat tissue in response to resistance training compared to those who receive supplements of soy or carbohydrate.

Detailed description

Healthy men and women will be recruited to participate in 9 months of supervised resistance training (3 days/wk) and will be randomized to one of three daily supplement groups: Whey protein, soy protein, or carbohydrate control. Body weight, muscular strength and endurance, and resting blood pressure will be assessed at baseline, 3, 6 and 9 months. Body composition will be assessed at baseline, 3, 5, 7, and 9 months. A sub-sample (N = 17 per group, assessed at baseline and 9 months) will be randomly selected for muscle samples of the upper leg to determine changes in the size of muscle fibers, and chemical factors associated with muscle growth. Blood samples will be obtained from sub-sample participants to assess changes in glucose and fat metabolism, as well as other chemicals likely to promote or inhibit muscle growth. We will also assess changes in daily energy expenditure and the use of fuel to produce energy (carbohydrate, fat, protein) that may result from the intervention. We hypothesize that those individuals who receive whey protein supplements will have larger gains in muscle and larger losses of fat tissue in response to resistance training compared to those who receive supplements of soy or carbohydrate.

Conditions

• Obesity

Interventions

Type	Name	Description
DIETARY_SUPPLEMENT	Whey Protein supplement	40 g/day of whey protein will be consumed in 2 doses for 9 months (Study duration)
DIETARY_SUPPLEMENT	Soy Protein Supplement	40 g/day of soy protein will be consumed in 2 doses for 9 months (Study duration)
DIETARY_SUPPLEMENT	Carbohydrate supplement	40 g/day of maltodextrin will be consumed in 2 doses for 9 months (Study duration)

Timeline

• Start date: 2007-06-01
• Primary completion: 2012-07-01
• Completion: 2012-07-01
• First posted: 2010-08-23
• Last updated: 2012-11-09

Locations

1 site across 1 country: United States