Whey Protein, Resistance Training, and Changes in Body Composition

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

85 participants

Study Classification

INTERVENTIONAL

Study Start Date

2007-06-30

Study Completion Date

2012-07-31

Brief Summary

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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

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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

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Obesity

Keywords

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Whey Protein Soy Protein Resistance training Weight Management

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

PREVENTION

Blinding Strategy

NONE

Study Groups

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