Ipsilateral graft and contralateral ACL rupture following ACL reconstruction in highly active athletes

analysis was then performed with MS values as the dependent variable, and the characteristics of the participants and values from the ultrasound images as independent variables. Statistical significance was defined as P< 0.05. Results: The value of MS was 151.3± 53.0 Nm, fat thickness (fat-T) was 0.54± 0.25 cm, fat EI (fat-EI) was 94.1± 11.4 pixels, MT of the RF (RFMT) was 1.87± 0.42 cm, EI of the RF (RFEI) was 71.9± 14.0 pixels, MT of the VI (VIMT) was 2.02± 0.51 cm, and EI of the VI (VIEI) was 54.7± 11.9 pixels.MS showed a significant negative correlation with fat-T, RFEI, and VIEI, and a significant positive correlation with height, weight, circumference, fat-EI, RFMT, and VIMT. Stepwise regression analysis identified height and VIMT, but not weight, circumference, fat-T, fat-EI, RFMT, RFEI, or VIEI, as independent variables that were significantly associated with MS (adjusted R2 = 0.65). Conclusion(s): These findings suggest that height and VIMT contribute to MS in young and middle-aged individuals. Implications: Although it may be difficult for physical therapists to measure knee extension MS in patients with knee pain, MS can be evaluated non-invasively by using the currently described method.