Effect of Elite Soccer Training on Routine Laboratory Parameters

Completed

• Conditions: Stress

• Registration Number: NCT00946855
• Lead Sponsor: Universität des Saarlandes

Brief Summary

Repeated blood sampling within a regular soccer season of German first league clubs shall serve to define soccer-specific reference values for routine parameters determined from venous blood. It was hypothesized that only for a minor number of parameters common reference values will have to be adapted for soccer players during their competitive season.

Detailed Description

It is often difficult to discern exercise-induced changes in laboratory parameters from pathological changes in elite athletes during the regular training process. This is particularly true in soccer players who compete more often than many other athletes. Therefore, soccer players of the first two German soccer leagues (all professional athletes) are recruited for repeated blood sampling during the season (4 sampling times, one of them immediately before training commences in the summer, the other ones in October/November, February/March, and April/May). Among other standardizing requirements, it is mandatory that precisely one training session (not zero, not two, no competition) takes place the day before sampling. Several confounders for the interpretation of laboratory results are verified by means of a questionnaire. Phases of high competitive stress are compared with those of low stress. The course of the parameters as well as confidence intervals for given times during the season are of main interest.

Study Timeline

• Study Start: 2008-08
• Primary Completion: 2009-05
• Status Verified: 2009-07
• Study Completion: 2009-07
• Study First Submitted: 2009-07-24
• Study First Submitted QC: 2009-07-24
• Last Update Submitted: 2009-07-24
• Study First Posted: 2009-07-27
• Last Update Posted: 2009-07-27

Recruitment & Eligibility

• Status: COMPLETED
• Sex: Male
• Target Recruitment: 467

Inclusion Criteria

• being employed as player by a club of the first two German soccer leagues
• healthy

Exclusion Criteria

• chronic disease interfering with one or more of the determined parameters

Study & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
complete blood count	August 2008 until May 2009

Secondary Outcome Measures

Name	Time	Method
numerous serum parameters from venous blood	August 2008 until May 2009

Trial Locations

Locations (1)

Institute of Sports and Preventive Medicine, University of Saarland, Campus, Bldg. B 8-2,; 🇩🇪 Saarbrücken, Saarland, Germany