Introduction: Anterior Cruciate ligament (ACL) plays an important role in the stability of the knee joint & its pivotal role in kinematics of the knee is well known. ACL injury is thought to contribute to impaired lower limb postural control. The ACL is proposed to play an integral role in the central somatosensory feedback loop by providing information regarding knee joint position and movement. The primary purpose of this study was to assess the functional outcome of Anterior Cruciate Ligament (ACL) reconstructed knee in terms of proprioception in patients who underwent ACL reconstruction using remnant preserving technique. We compared the functional outcome and proprioception in patients who underwent preoperative ACL exercises and those who did not undergo preoperative exercises. The secondary purpose was to assess the effect of Vitamin D and Body Mass Index (BMI) on functional outcome including proprioception. Materials and Methods: This was a prospective study. 30 patients belonging to the age group of 18-50 who underwent ACL reconstruction were included in this study. A detailed history and clinical examination was done. Diagnosis was confirmed with standard clinical test & with the help of Magnetic Resonance Imaging (MRI). Those patients with established ACL injury (partial or complete) were taken up for ACL reconstruction using remnant preserving technique. Subjective assessment was done with IKDC, Lysholm-Tegner and KOOS scores. For functional assessment we measured proprioception by Joint Position Sense (JPS), TTDPM-Threshold to Detection of Passive Motion, Proprioception test A and B, Single leg standing test and Wobble board test. Results: We found significant improvement in the proprioception and subjective scorings with IKDC, KOOS and Lysholm-Tegner postoperatively. The functional outcome in terms of proprioception was significantly better in patients who underwent preoperative ACL protocol exercises than those who did not undergo preoperative exercises. We did not get any statistical significance between the levels of Vitamin D and BMI comparing with proprioception (TTDPM). Conclusion: ACL remnant stumps contain mechanoreceptors which if preserved during ACL reconstruction might in turn improve the postoperative functional outcomes. In our study we found that pre-operative exercises have a better functional outcome along with proprioception in patients undergoing ACL reconstruction. Hence it would be desirable to preserve the ACL remnant and to undergo preoperative exercises.