Sensitivity testing of the input work-rest ratios found the best correlation (r2 = 0.84) at 17% of the modeled rest level.
Subsequently, work-rest ratios based on this analysis would have appeared much closer to those recommended by the ITS.
Standardized exercise training with prescribed work-rest ratios, intensity, volume and time are more effective in improving physical fitness, especially short term [ 23, 32, 33].
Work-rest ratios have previously been defined as the time spent in ≥moderate speed zones (work) in relation to ≤low speed zones (rest), which can be used to plan and monitor the intensity of training sessions [ 25, 26].
The aim of this study was to examine the effects of a short training intervention using two repeated sprint protocols matched for total sprint duration and work:rest ratio.
In between the exercises, the children will have an active rest period (not sitting down), varying from 60 to 80 seconds, as determined by the work:rest ratio.
The work:rest ratio starts at 1 5 in the first week, decreases to 1 4 in the second week, and to 1 3 in the 15th week.
The physiotherapists are allowed to vary the exercises or make up new exercises, as long as the children will perform the exercises at maximal intensity according to the prescribed work:rest ratio.
This highlights the specificity of the adaptations induced to the training protocol utilised (work and rest durations and work:rest ratio) and hence the specific metabolic demands of the training.
During these matches, a work rest ratio of 1 : 2 is reported with movement demands requiring a mean of three shots, 4.2 directional changes and an average distance of 3 m is required to optimally position the body for shot production and execution.
