Interval Shuttle Run Test (ISRT)

Interval Shuttle Run Test (ISRT) is an intermittent fitness test where athletes run for 30 seconds periods interspersed with 15 seconds of walking. The test was developed by Lemmink et al. since 2000. There is a similar test, the 30-15 Intermittent Fitness Test with the same work/rest intervals but with different running speeds and a 40m running course. The more commonly used Yo-Yo intermittent test is another intermittent type beep test.


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There are over 300 fitness tests, so it's not easy to choose the best one. You should consider the validity, reliability, costs and ease of use of each test. Use our guide to conducting, recording, and interpreting fitness tests. Any questions, please ask or search for your answer. To keep up with the latest in sport science and this website, subscribe to our newsletter. We are also on facebook and twitter.

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