A subset of 624 patients from the STABILITY trial were randomized to receive an anterior cruciate ligament reconstruction (ACLR) alone or an ACLR with accompanying lateral extra-articular tenodesis (ACLR+LET). The primary outcome of interest was the Limb Symmetry Index (LSI), measured with 4 hop tests. Secondary outcomes of interest included the Lower Extremity Functional Scale (LEFS), quadriceps index (QI) and hamstring index (HTI). Follow up was performed at 6, 12 and 24 months post-operation. Results from the study revealed significantly favourable LSI, QI peak torque, QI average power, and LEFS scores in the ACLR alone group at 6 months compared to the ACLR+LET group. At 12 months, no significant differences were observed in all outcomes between the two groups. Moreover, no significant difference in HTI at 24 months was observed between the two groups.