NCT00972387

Carbohydrate-Protein Supplementation During Endurance Running

"Nutritional Ergogenic Aids: The Effects of Carbohydrate-Protein Supplementation During Endurance Exercise"

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 12 (actual)
• Sponsor: The University of Tennessee, Knoxville · Academic / Other
• Sex: Male
• Age: 18 Years – 55 Years
• Healthy volunteers: Accepted

Summary

The purpose of this study is to assess whether the greater performance benefits from ingesting carbohydrate-protein supplements during endurance running, in comparison to the traditionally used carbohydrate supplement, is attributed to the extra calories contained in the carbohydrate-protein supplement or the presence of protein.

Detailed description

The purpose of this study is to determine whether the performance benefits from consuming a carbohydrate-protein (CHO-P) supplement, such as Accelerade, during endurance exercise, as opposed to the traditionally used carbohydrate (CHO) supplement, such as Gatorade, are attributed to the extra calories in the CHO-P supplement or the presence of protein alone in comparison to CHO supplements. Numerous studies comparing CHO and CHO-P supplements on endurance performance have found contradicting results in terms of CHO-P supplementation and performance benefits. While physiological mechanisms have been proposed as to why the CHO-P supplements elicit greater performance, research has yet to determine why some studies have found this, especially while other studies have found no performance benefits from CHO-P supplementation. This inconsistency in research may be due to the caloric difference between supplements tested; due to the addition of protein, the CHO-P supplement contains more calories per serving than the CHO supplement. As a result, this study will be comparing 4 different supplements during endurance exercise, a CHO-P supplement, CHO supplement, a double carbohydrate supplement (CHO-CHO), and a placebo (PLA). The CHO and CHO-P supplement will be matched for CHO content, whereas the CHO-P and CHO-CHO supplements will be matched for total caloric content. Participants will be asked to run four 12-mile runs on 4 separate occasions, approximately 7-10 days apart, and will be blinded to supplement content and order of supplement administration among trials. The 12-mile run will elicit an exercise bout greater than 60 minutes, which is relevant when supplementing exercise with CHO or CHO-P. Performance will be assessed via time it takes to complete both the 12-mile run and the 1.6 mile maximal effort at the end of the run.

Conditions

• Supplementation During Endurance Performance

Interventions

Type	Name	Description
DIETARY_SUPPLEMENT	CHO, CHO-P, CHO-CHO, PLA	The CHO supplement will be administered during trial 1. The CHO-P will be administered during trial 2. The CHO-CHO supplement will be administered during trial 3. The PLA supplement will be administered during trial 4. This is the order of supplement administration for subjects randomly assigned to this order group.
DIETARY_SUPPLEMENT	CHO-P, CHO-CHO, PLA, CHO	The CHO-P supplement will be administered during trial 1. The CHO-CHO will be administered during trial 2. The PLA supplement will be administered during trial 3. The CHO supplement will be administered during trial 4. This is the order of supplement administration for subjects randomly assigned to this order group.
DIETARY_SUPPLEMENT	CHO-CHO, PLA, CHO, CHO-P	The CHO-CHO supplement will be administered during trial 1. The PLA will be administered during trial 2. The CHO supplement will be administered during trial 3. The CHO-P supplement will be administered during trial 4. This is the order of supplement administration for subjects randomly assigned to this order group.
DIETARY_SUPPLEMENT	PLA, CHO, CHO-P, CHO-CHO	The PLA supplement will be administered during trial 1. The CHO will be administered during trial 2. The CHO-P supplement will be administered during trial 3. The CHO-CHO supplement will be administered during trial 4. This is the order of supplement administration for subjects randomly assigned to this order group.

Timeline

• Start date: 2009-08-01
• Primary completion: 2010-04-01
• Completion: 2010-04-01
• First posted: 2009-09-04
• Last updated: 2018-04-05

Locations

1 site across 1 country: United States