Effect of Whey Protein on Soccer Performance

NCT01110122 | Unknown

• 1 other identifier: AJA-PROT-IAB-001
• Study Type: interventional
• Target: 50
• Locations: 1 country
• Sites: 1

Brief Summary

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.

Conditions

Muscle Damage

Keywords

Muscle recovery; Intermittent exercise; Whey protein; Soccer

Outcome Measures

Primary Outcomes (1)

• Muscle recovery

  Recovery will be measured with the test scores on the Yo-Yo Intermittent Recovery Test level 2 and the Countermovement Jumping Test.

  2 weeks

Interventions

Whey protein DIETARY_SUPPLEMENT

20g, oral, dissolved in yoghurt-drink, after every training and match for 2 weeks

Eligibility Criteria

• Age: 15 Years - 19 Years
• Sex: male
• Healthy Volunteers: Yes
• Age Groups: Child (0-17), Adult (18-64)

You may qualify if:

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

You may not qualify if:

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

Sponsors & Collaborators

• VU University of Amsterdam: lead

Study Sites (1)

Ajax

Amsterdam, Netherlands

RECRUITING

MeSH Terms

Interventions

Whey Proteins

Intervention Hierarchy (Ancestors)

Milk Proteins; Animal Proteins, Dietary; Dietary Proteins; Proteins; Amino Acids, Peptides, and Proteins; Whey; Milk; Dairy Products; Food; Diet, Food, and Nutrition; Physiological Phenomena; Food and Beverages

Study Officials

• Ingeborg A Brouwer, PhD

  VU University of Amsterdam

  PRINCIPAL INVESTIGATOR

Central Study Contacts

Ingeborg A Brouwer, PhD

CONTACT

+31-20-5987702; ingeborg.brouwer@falw.vu.nl

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: DOUBLE
• Who Masked: PARTICIPANT, OUTCOMES ASSESSOR
• Purpose: PREVENTION
• Intervention Model: CROSSOVER
• Sponsor Type: OTHER

Study Record Dates

• First Submitted: April 22, 2010
• First Posted: April 26, 2010
• Study Start: March 1, 2010
• Primary Completion: June 1, 2010
• Study Completion: July 1, 2010
• Last Updated: April 26, 2010

Record last verified: 2010-03

Locations

NL (1)