Figure 1. Return to sport framework - the control-chaos continuum. Control=high level of structure on behaviour/actions/movement, that is, controlled situation. Chaos=unpredictable behaviour/actions/movement, as to appear random/reactive, that is, chaotic situation. Green represents high control (low intensity) moving towards high chaos (high intensity). Model can be adjusted according to specific injury diagnosis, estimated tissue healing times and expected return to training. Acc/Dec Magnitude =rate of change in velocity, for example, 3 ms−2.**Game load adjustable dependent on injury type/severity. ACC, accelerations; BW, bodyweight; COD, change of direction; DEC, decelerations; Exp-D, explosive distance (accelerating/decelerating from 2 to 4 ms−1 <1 s); HSR, high-speed running (>5.5 ms−1); MS, maximal speed; MAXHR, maximal heart rate; PR, passive recovery; SPR, sprint distance (>7 ms−1); TD, total distance.
Figure 2. Sample return to chronic running loads using the control-chaos continuum. Data representative of central defender game load, that is, physical demands of game (mean) and respective training and concurrent (including game) in both absolute and relative (game load, ie, 2x=2 games). Control-chaos continuum: control=high level of structure onbehaviour/actions/movement, that is, controlled situation. Chaos=unpredictable behaviour/actions/movement, as to appear random/reactive, that is, chaotic situation. Green represents high control (low intensity) moving towards high chaos (high intensity). High-speed running, >5.5 ms−1; Sprint distance, >7 ms−1; Explosive distance (accelerating/decelerating from 2 to 4 ms−1<1 s).
Figure 3. Example of a potential weekly planning template from high and moderate control. Arrows represent session load increments in week-to-week individual return to running sessions (increments represent increases in running loads individualised to the player and specifics of their injury). Intensity, arbitrary unit (au); Off, day off; Recovery, recovery day; RTR1, return to running 1; RTR2, return to running 2.
Figure 4. Example of a potential weekly planning template from control—>chaos to high chaos. Arrows represent load increments in week-to-week individual intensive and extension outdoor physical preparation sessions to build chronic load (increments represent increases in running loads individualised to player and specifics of their injury). Extensive, extensive football; Intensive, intensive football; Intensity; Intensity, arbitrary unit (au); Off, day off; Recovery, recovery day.
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Taberner et al. (2019) studied this question.
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