Multi-stage fitness test
shuttle walking test to estimate an athlete's maximum oxygen uptake
The multi-stage fitness test (MSFT), also known as the beep test, bleep test, PACER test (progressive aerobic cardiovascular endurance run), or the 20m shuttle run test, is a multi-stage running test used to estimate an athlete's aerobic capacity (VO2 max). The test gets progressively more difficult as it continues.
The test requires participants to run 20 meters back and forth across a marked track keeping time with beeps. Every minute, the time between beeps gets shorter, and participants must run faster. If a participant fails to reach the relevant marker in time, they are cautioned. A second caution ends the test for that runner. The number of shuttles completed is recorded as the score of that runner. The score is recorded in "Level.Shuttles" format (e.g. 9.5). The maximum number of laps on the 20-meter PACER test is 247.
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