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Scale to assess between-efforts recovery (left) and change of direction (right) abilities during high-intensity intermittent runs, derived from between-tests differences in maximal running speed (VIFT). 30-15IFT : original 30-15IFT, 30-15IFT-CONT : modified version of the 30-15IFT without resting period, 30-15IFT-LINE : modified version of the 30-15IFT without changes of direction. See methods for thresholds calculations.
