30-15 Intermittent Fitness Test (30-15 IFT)
Determine Maximal Intermittent Running Velocity (VIFT) to individualize high-intensity interval training (HIIT)
Standardized testing protocol
30 seconds of shuttle running between lines A, B, and C interspersed with 15 seconds of passive/walking recovery. The test starts at 8.0 km/h (or 10.0 km/h) and running speed increases by 0.5 km/h for each successive 45-second stage. The test terminates when an athlete is unable to reach the designated 3-meter tolerance zone at the audio beep on three consecutive occasions.
Required field equipment
40-meter flat course with 3 marker lines at 0m (A), 20m (B), and 40m (C), 3m recovery zones, cones, Time4Test audio soundtrack
Calculation formula & scoring
Time4Test automates this equation directly during the session:
Buchheit, M. (2008). The 30-15 Intermittent Fitness Test: Accuracy for individualizing interval training of young intermittent sport players. J Strength Cond Res, 22(2): 365-374.
Execute in Time4Test
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