• scoring: The athletes score is the level and number of shuttles reached before they were unable to keep up with the tape recording. This score can be converted to a VO2max equivalent score using this calculator.
• equipment required: Flat, non-slip surface, marking cones, 20m measuring tape, pre-recorded audio tape, tape recorder, recording sheets.
• target population: Suitable for sports teams and school groups, but not for populations in which a maximal exercise test would be contraindicated.
• validity: There are published VO_2max score equivalents for each level reached (calculator available here). The correlation to actual VO_2max scores is high.
• reliability: Reliability would depend on how strictly the test is run, and the practice allowed for the subjects.
• advantages: Large groups can perform this test all at once for minimal costs. Also, the test continues to maximum effort unlike many other tests of endurance capacity.
• disadvantages: Practice and motivation levels can influence the score attained, and the scoring can be subjective. As the test is usually conducted outside, the environmental conditions can be often affect the results.
• other considerations: 
  • As the audio-tapes may stretch over time, the tapes need to be calibrated which involves timing a one-minute interval and making adjustment to the distance between markers. The recording is also available on compact disc, which does not require such a stringent calibration, but should also be checked occasionally (see calibrating your tape)
  • This test goes by many names, though you need to be careful as the different names also may signify that these are different versions of the test. Therefore you need to be wary when comparing results or comparing to norms.
  • This test is a maximal test, which requires a reasonable level of fitness. It is not recommended for recreational athletes or people with health problems, injuries or low fitness levels.

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