Previous studies have reported that the orientation of the foot with respect to the direction of progression can affect the frontal plane lever arm at the knee joint, hence knee adduction moment However, we did not find any significant (P>0.05) changes in foot progression angle (pre: 4.7+_ 1.2 vs. post:5.1+_1.1 mean values during the entire stance phase). Our findings rather suggest that the lower knee adduction moment resulted from the decreased moment output from the hip abductors following the intervention. We found a significant relationship between the ratio post- to pre-intervention in external knee adduction moment and the ratio post- to pre-intervention in external hip adduction joint moment (r up to 0.81). The hip abductors act to increase the mediolateral component of the GRF in particular during the single support phase , and an experimentally impaired gluteus medius muscle function has been s shown to reduce the external knee adduction moment while walking.A reasonable explanation for our findings is therefore, that by decreasing the hip abduction moment output during the initial and mid portions of the stance phase the older adults decreased the mediolateral component of the GRF positioning the line of action of the GRF closer to the knee joint and thereby decreasing the external knee adduction moment post-intervention