Key gaps in knowledge regarding HSMS injury prevention programs remain. Most critically, the effectiveness of HSMS prevention programs among basketball athletes is unknown. Furthermore, the comparative effectiveness of eccentric, flexibility, and NM training for reduction of HSMS injuries is also unknown. Assessment of lower extremity strength, rate of power production, flexibility, and stiffness (captured with SWE) may elucidate the mechanisms underlying the effectiveness of injury prevention training, and aid in enhancement of injury prevention programs. Thus, the potential impact of this proposal is profound as our investigative team aims to fill these gaps in knowledge. Ultimately, the results of this study have the potential to 1) reduce injuries among basketball athletes and consequently enhance and lengthen athletic careers, 2) provide scientific rationale underlying the effects of HSMS injury prevention training, and 3) determine if a novel ultrasound imaging technique may be effective in determining risk for HSMS.