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Related Experiment Video

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Evaluation of a Goalkeeper-Specific Adaptation to the Yo-Yo Intermittent Recovery Test Level 1: Reliability and

Alex M Ehlert1, John R Cone2, Laurie Wideman1

  • 1Department of Kinesiology, The University of North Carolina at Greensboro, Greensboro, North Carolina.

Journal of Strength and Conditioning Research
|October 27, 2018
PubMed
Summary
This summary is machine-generated.

A new goalkeeper-specific Yo-Yo Intermittent Recovery Test Level 1 (YYIR1-GK) shows high reliability and low variability for collegiate goalkeepers. This adaptation offers a consistent measure of intermittent fitness for male and female goalkeepers.

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Area of Science:

  • Sports Science
  • Physiology
  • Soccer Performance Analysis

Background:

  • The Yo-Yo Intermittent Recovery Test Level 1 (YYIR1) is a validated measure of intermittent fitness for field soccer players.
  • Existing YYIR1 protocols lack specificity for the unique demands placed on goalkeepers (GKs).
  • A need exists for a reliable and valid assessment tool tailored to GK intermittent exercise capacity.

Purpose of the Study:

  • To evaluate the test-retest reliability and variability of a goalkeeper-specific adaptation of the YYIR1 (YYIR1-GK).
  • To establish the consistency of the YYIR1-GK in assessing intermittent fitness in collegiate goalkeepers.

Main Methods:

  • Sixteen NCAA collegiate goalkeepers (8 male, 8 female) completed the YYIR1-GK twice, with a >4 and <7 day interval between tests.
  • Testing occurred under controlled indoor conditions at the same time of day.
  • Heart rate and rating of perceived exertion were recorded; reliability was assessed using Pearson correlations, ICC, and CV.

Main Results:

  • The YYIR1-GK demonstrated strong test-retest reliability for both male (r=0.981, ICC=0.980, CV=5.82%) and female (r=0.969, ICC=0.956, CV=9.60%) goalkeepers.
  • Male goalkeepers achieved significantly higher stage counts and distances compared to female goalkeepers (p=0.05).
  • The test exhibited low variability, indicating consistent performance measures.

Conclusions:

  • The YYIR1-GK is a reliable and consistent assessment tool for evaluating intermittent fitness in male and female collegiate goalkeepers.
  • This adapted test provides a valid measure of GK-specific intermittent endurance.
  • Future research should investigate the YYIR1-GK with larger, more diverse GK populations across various skill levels.