Osteoarthritis is the most common joint disease in the world. [12] Its prevalence in the hip joint is observed to have dramatic adverse effects on the quality of life of aging adults and can contribute to more significant health issues. [1] Hip osteoarthritis (HOA) reflects a breakdown in hip mechanics, muscle strength, and decreased biomechanics. [4, 8] The purpose of this study is to compare the relationship between deficits in hip mechanics of the frontal (primary) and sagittal (secondary) planes onto physical function, using validated physical performance and muscle strength metrics in adults with HOA. We hypothesized that more significant deficits in the involved limb's hip mechanics (angle, moment, power) would be associated with poorer Two-Minute Walk Test and 30-Second Sit-to-Stand Test performance. We also hypothesized that more significant deficits in hip mechanics would be associated with greater hip abduction, knee extension, and knee flexion weakness of the involved limb. The data collection and processing have been assisted by Chelsea Wilbur and Bennet Browning. This study is still in progress; results and discussion will be added upon completion.