Abstract
Purpose: The reliability and construct validity of three age-adapted-intensity Yo-Yo tests were evaluated in untrained (n=67) vs. soccer-trained (n=65) 9-16-year-old school-girls.
Methods: Tests were performed 7 days apart for reliability (9-11-year-old: Yo-Yo intermittent recovery level 1 children’s test; 12-13-year-old: Yo-Yo intermittent endurance level 1; and 14-16-year-old: Yo-Yo intermittent endurance level 2).
Results: Yo-Yo distance covered was 43% (747±364 vs. 522±162 m), 83% (1236±514 vs. 674±231 m) and 137% (679±348 vs. 286±67 m) greater (P≤0.010) for the soccer-trained than for the untrained girls aged 9-11, 12-13 and 14-16, respectively. Typical errors of measurement for Yo-Yo distance covered, expressed as a percentage of the coefficient of variation (confidence limits), were 10.1% (8.1-13.7%), 11.0% (8.6-15.4%) and 11.6% (9.2-16.1%) for soccer players, and 11.5% (9.1-15.8%), 14.1% (11.0-19.8%) and 10.6% (8.5-14.2%) for untrained girls, aged 9-11, 12-13 and 14-16, respectively. Intraclass correlation coefficient values for test-retest were excellent (0.795-0.973) in both groups. No significant differences were observed in relative exercise peak heart rate (%HRpeak)between groups during test and retest.
Conclusion: The Yo-Yo tests are reliable for determining intermittent-exercise capacity and %HRpeak for soccer players and untrained 9-16-year-old girls. They also possess construct validity with better performances for soccer players compared to untrained age-matched girls, despite similar %HRpeak.
Methods: Tests were performed 7 days apart for reliability (9-11-year-old: Yo-Yo intermittent recovery level 1 children’s test; 12-13-year-old: Yo-Yo intermittent endurance level 1; and 14-16-year-old: Yo-Yo intermittent endurance level 2).
Results: Yo-Yo distance covered was 43% (747±364 vs. 522±162 m), 83% (1236±514 vs. 674±231 m) and 137% (679±348 vs. 286±67 m) greater (P≤0.010) for the soccer-trained than for the untrained girls aged 9-11, 12-13 and 14-16, respectively. Typical errors of measurement for Yo-Yo distance covered, expressed as a percentage of the coefficient of variation (confidence limits), were 10.1% (8.1-13.7%), 11.0% (8.6-15.4%) and 11.6% (9.2-16.1%) for soccer players, and 11.5% (9.1-15.8%), 14.1% (11.0-19.8%) and 10.6% (8.5-14.2%) for untrained girls, aged 9-11, 12-13 and 14-16, respectively. Intraclass correlation coefficient values for test-retest were excellent (0.795-0.973) in both groups. No significant differences were observed in relative exercise peak heart rate (%HRpeak)between groups during test and retest.
Conclusion: The Yo-Yo tests are reliable for determining intermittent-exercise capacity and %HRpeak for soccer players and untrained 9-16-year-old girls. They also possess construct validity with better performances for soccer players compared to untrained age-matched girls, despite similar %HRpeak.
| Original language | English |
|---|---|
| Journal | Pediatric Exercise Science |
| Volume | 28 |
| Issue number | 2 |
| Pages (from-to) | 321-330 |
| Number of pages | 10 |
| ISSN | 0899-8493 |
| DOIs | |
| Publication status | Published - May 2016 |
Keywords
- Girls
- Heart rate
- Intermittent exercise performance
- YYIE1
- YYIE2
- YYIR1C
- Heart Rate
- Reproducibility of Results
- Physical Fitness/physiology
- Soccer
- Humans
- Exercise Test
- Adolescent
- Female
- Child