Yo-Yo Intermittent Test

The Yo-Yo Intermittent Test Chrome extension provides an easy way to assess your stamina and endurance based on the Yo-Yo Intermittent Recovery and Endurance Tests developed by Jens Bangsbo. Designed for sports like soccer and basketball that involve stop-and-go activity, this app guides you through Level 1 and Level 2 protocols with selectable voice cues or ringtones.

Features include countdown timers to shuttle points, recovery times, distance tracking, and elapsed time display. After completing your test, it reports the level achieved and total distance covered. For Recovery Level 1, a rough VO2Max estimate is given if you run at least 1000 meters. While the free version does not support result saving, screenshots are possible. The Pro version offers extended features such as group testing, advanced analytics, saving/exporting data, and more.

This extension is ideal for athletes and coaches looking to perform scientifically-backed stamina evaluations for rigorous intermittent sports, with an intuitive interface and reliable metrics direct from Copenhagen University's fitness research.