Overweight and obese ( BMI @ kg m ( -@ ) ) middle-aged and older adults ( aged @-@ years at enrollment ) with type @ diabetes ( n = @ ) at four clinics in Look AHEAD , a trial evaluating an intensive lifestyle intervention ( ILI ) designed to achieve weight loss through caloric restriction and increased physical activity compared to diabetes support and education ( DSE ) , underwent standardized assessments of performance-based physical function including an expanded short physical performance battery ( SPPBexp ) , @-m and @-m walk , and grip and knee extensor strength @ years post-randomization , during the trial 's weight maintenance phase .