Aging is a universal process characterized by progressive musculoskeletal changes, notably spinal disc degeneration, which frequently compromises independent mobility. While the physiological decline of the spine is well-documented, the specific threshold at which these changes substantively hinder gait remains poorly defined.The primary objective of this study is to identify the age-related impact of disc degeneration on independent gait, specifically focusing on the biomechanics of the ankle and knee joints. To achieve this, the project utilizes Statistical Parametric Mapping (SPM) to evaluate continuous gait data across two distinct cohorts: individuals below 65 years and those above 65 years.The analysis assesses statistical differences in joint angles, moments, and power to pinpoint where mechanical inefficiencies emerge. By quantifying these kinetic and kinematic variances, this research aims to define the critical age range at which spinal degeneration necessitates rehabilitative intervention. These findings will contribute to more targeted clinical strategies for maintaining mobility and functional independence in the aging population.