. "We used the 400-m walk test (400MWT) as a measure of mobility because loss of the ability to walk 400 m predicts multiple adverse outcomes such as morbidity, worsening disability, CVD, institutionalization, and mortality.11- 14 Clearly, the ability to walk without assistance is a critical factor in an older person's capacity to function independently in the community.15 Our primary aim was to comp" . . .