Effect of Elite Soccer Training on Routine Laboratory Parameters

Stress Clinical Trial

— SOCCERLAB  

Official title:

Laboratory Values in Elite Soccer Players

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT00946855
• Other study ID #: Soccer laboratory values
• Status: Completed
• Phase: N/A
• First received: July 24, 2009
• Last updated: July 24, 2009
• Start date: August 2008
• Est. completion date: July 2009

Study information

• Verified date: July 2009
• Source: Saarland University
• Contact: n/a
• Is FDA regulated: No
• Health authority: Germany: Ethics Commission
• Study type: Observational

Clinical Trial 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.

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.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 467
• Est. completion date: July 2009
• Est. primary completion date: May 2009
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: Male
• Age group: 18 Years to 40 Years

Eligibility

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

Observational Model: Cohort, Time Perspective: Prospective

Related Conditions & MeSH terms

• Stress

Locations

Country	Name	City	State
Germany	Institute of Sports and Preventive Medicine, University of Saarland, Campus, Bldg. B 8-2,	Saarbrücken	Saarland

Sponsors (1)

Lead Sponsor	Collaborator
Saarland University

Country where clinical trial is conducted

Germany, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	complete blood count		August 2008 until May 2009	No
Secondary	numerous serum parameters from venous blood		August 2008 until May 2009	No