Normative Yo-Yo Intermittent Recovery Level 1 and Yo-Yo Intermittent Endurance Level 1 test values of boys aged 9–16 years - ScienceDirect
Yo-Yo Endurance Test
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Test your team's running fitness
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Free Yo-Yo Test Scoring Sheet (YYIE2)
Yo-Yo Test Scoring Sheets
Yo-Yo Intermittent Recovery Test Level 1 - Science for Sport
Which Yo-Yo Test Version Did You Do?
Normative Yo-Yo Intermittent Recovery Level 1 and Yo-Yo Intermittent Endurance Level 1 test values of boys aged 9–16years - Journal of Science and Medicine in Sport