Yo-Yo Intermittent Recovery Test Level 1 (Yo-Yo IR1)
Estimate performance in stop-and-go sports; measure capacity for intermittent aerobic exercise
Standardized testing protocol
Runners complete 20m shuttle runs (5m to 25m and back to 5m) at incrementally increasing speeds. A 10-second active rest is taken between each 40m circuit by strolling to the 0m marker and returning to the 5m marker. Two consecutive failures to reach the marker in time terminate the test.
Required field equipment
25-meter track with markers at 0, 5, and 25m, audio source with double-beep cue, flat surface
Calculation formula & scoring
Time4Test automates this equation directly during the session:
Bangsbo, J. et al. (2008). The Yo-Yo Intermittent Recovery Test. Sports Medicine.
The app does not count the last two shuttles in the final score calculation because the test ends after two consecutive failures.
Execute in Time4Test
Calibrated acoustic audio cues, live split recording, and instant automated calculation on your smartphone.
Download on Google Play