30-15IFT for Team Sports Conditioning

In this video I provide an overview of the 30-15IFT test.

This is a reliable measure of aerobic capacity (Stankovic et al., 2021), but also provides us with more information than aerobic fitness alone. It has been correlated with repeat sprint ability, for example, which is a more specific measure of field-based sports performance.

This is a shuttle based, intermittent running test, whereby athletes run for 30 seconds, before having a 15 second recovery period. Athletes start at a running speed of 8kph, and this increases every level by 0.5kph. The final level completed is the athlete’s VIFT score. For example, if an athlete completes level 20, but isn’t able to complete level 20.5, their final score is 20kph.

This isn’t a true measure of MAS, as the speed achieved will be higher than MAS due to the intermittent nature of the test. As athletes have a 15-second recovery between levels, their final velocity is called ‘velocity in the intermittent fitness test (VIFT) and is a ‘composite velocity’. This also takes into account their anaerobic capabilities and change of direction ability, all of which contribute to field-based sports performance (Buchheit, 2010).

The 30-15IFT enables a more consistent physiological response than simply prescribing from a time trial assessment alone. This is because it considers an athlete’s anaerobic capabilities as well as their aerobic capabilities.

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