Effect of Whey Protein on Soccer Performance

April 22, 2010 updated by: VU University of Amsterdam

The Effect of Post-exercise Supplementation With Whey Protein Versus Carbohydrate on Soccer Performance.

Rationale: During exercise protein breakdown in muscles is larger than protein synthesis. This negative muscle protein balance leads to increased muscle damage and thereby to a reduced muscle tissue recovery. To achieve a positive muscle protein balance and reduce muscle damage, many athletes use proteins. In professional soccer players, considerable stress is placed on the musculoskeletal system. Recovery time is often too short for these players to restore homeostasis, which results in catabolic processes. This increases playing errors and will lead to lapses in concentration. Therefore, it is of great importance for a professional soccer team to be in optimal condition and a fast recovery after exercise is desirable to accomplish maximum performance. Supplementation with whey proteins is thought to support this.

Objective: To assess whether post-exercise supplementation with whey protein will lead to a better muscle recovery than supplementation with carbohydrates in Dutch soccer players between the age of 15 and 18 years old.

Study design: A double blind randomised controlled cross-over trial.

Study population: Healthy soccer players of the A and B selection of AJAX between the age of 15 and 18 years old.

Intervention: Supplement, containing either whey proteins or an isocaloric carbohydrate placebo. Each supplement will be administered for 2 weeks separated by a 7 day washout period. Treatment order will be randomly assigned.

Main study parameters: The main study parameter will be the Yo-Yo intermittent recovery test level 2 score and the vertical jump test. The scores will evaluate the soccer players' ability to repeatedly perform intense exercise and his potential to recover from this exercise.

Study Overview

Status

Unknown

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Anticipated)

50

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Netherlands
      • Amsterdam, Netherlands
        • Recruiting
        • Ajax
        • Contact:
        • Principal Investigator:
          • Niels Wijne, MD

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

15 years to 19 years (Child, Adult)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

Male

Description

Inclusion Criteria:

  • performing soccer >1 year
  • part of A & B selection of AJAX

Exclusion Criteria:

  • presence of lactose intolerance
  • presence of illness
  • presence of injury

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Prevention
  • Allocation: Randomized
  • Interventional Model: Crossover Assignment
  • Masking: Double

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Muscle recovery
Time Frame: 2 weeks
Recovery will be measured with the test scores on the Yo-Yo Intermittent Recovery Test level 2 and the Countermovement Jumping Test.
2 weeks

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

VU University of Amsterdam

Investigators

  • Principal Investigator: Ingeborg A Brouwer, PhD, VU University of Amsterdam

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

March 1, 2010

Primary Completion (Anticipated)

June 1, 2010

Study Completion (Anticipated)

July 1, 2010

Study Registration Dates

First Submitted

April 22, 2010

First Submitted That Met QC Criteria

April 22, 2010

First Posted (Estimate)

April 26, 2010

Study Record Updates

Last Update Posted (Estimate)

April 26, 2010

Last Update Submitted That Met QC Criteria

April 22, 2010

Last Verified

March 1, 2010

More Information

Terms related to this study

Keywords

Other Study ID Numbers

  • AJA-PROT-IAB-001

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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