Comparison between Isokinetic Quadriceps and Hamstring Strength and Clinical Outcomes after Single Bundle and Double Bundle ACL Reconstruction in Sportspersons

Existing studies suggest the advantage of rotational stability in DB ACL over SB ACL. However, the contribution of strength parameters need to be evaluated further. Muscle strength deficiet is one of the consequences after ACL reconstruction. The aim of this study was to evaluate any possible differences in isokinetic hamstring and quadriceps muscle strength and functional outcome after SB and DB ACL Reconstruction in sportspersons. We tested 30 sportspersons (15 SB and 15 DB) after primary reconstruction of ruptured anterior cruciate ligament at angular velocities of 60°/second and 120°/second using isokinetic dynamometer, functional testing was done using lysoholm and IKDC score. Overall, there was statistically significant difference in flexion and extension strength parameters at 60°/sec as compared to 120°/second in both SB and DB groups. there was no significant difference in isokinetic strength of quadriceps and hamstrings between SB and DB groups. Clinical evaluation done by lysoholm and IKDC score also showed no significant difference. However, in both groups maximal muscle strength is more than muscle endurance.