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.

purpose: To assess the ability to recover and repeat intermittent activity

equipment required: clear flat area for conducting the test at least 20m long, audio recording of test, marker cones.

pre-test: Explain the test procedures to the subject. Perform screening of health risks and obtain informed consent. Prepare forms and record basic information such as age, height, body weight, gender, test conditions (surface, weather). Measure and mark out the course. Ensure that the subjects are adequately warmed-up. See more details of pre-test procedures.

test layout: Mark out a 20m area with markers at either end. Also place markers 3 meters before each end line (tolerance zones).

procedure: The test involves 30 seconds of running alternated with 15 seconds of walking. Participants start behind one of the end lines. They begin to run on the first "beep", pacing their effort to arrive at the opposite end at the next "beep". This continues until there is a double beep, indicating the end of the 30 second period, and which point they stop running. This will not necessarily be at either end line. They then walk forwards to the next line, waiting for the start of the next level in 15 seconds. The running speed starts at 10 km/hr, and increases by 1 km/hr every 90 seconds. Once the running speed has reached 13km/hr, the increase in speed is 0.5km/hr. The test ends when the athlete fails to make it into the tolerance zone twice.

scoring: The number of fully completed 20 meter runs was recorded as the test score

target population: This test was developed for team sport players, players of sports which are intermittent in nature.

advantages: this test is more relevant to intermittent sports rather than the commonly used beep test.

disadvantages: the test is not commonly used so normative values are hard to find. Also the audio recording would be hard to create or purchase.

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