Table 1. Justification, optimum value, and the effect on the stimulus for the included biomechanical variables.
Variable Stimulus Effect Abbreviation Justification Optimum Value References
Trunk lean Figure 1B - Lateral trunk displacement predicted ACL injuries with high sensitivity and specificity in females. (Hewett et al., 2009; Paterno, 2017; Zazulak et al., 2007)
Knee-to-hip joint extensor moment of force ratio Figure 1C KHMr Quadriceps-dominant recruitment during dynamic movement is a risk factor for lower extremity injuries. ≤ 1 (Ford et al., 2008; Myer et al., 2009)
Knee abduction moment of force Figure 1D KAM Valgus knee collapse and subsequent increased knee abduction moment occurs more frequently in ACL injury risk prone athletes. ≤ 0 Nm (Hewett et al., 2005a; Schoenfeld, 2010)
Vertical ground reaction force ratio Figure 1E vGRF Asymmetry in ground reaction force indicates preference for and the potential for abnormal joint loading on one limb. 1 (Hewett et al., 2005a)