A total of 102 participants ( mean SD age , 46.5 12.7 yrs ; body mass index , 32.0 5.8 kg/m ( 2 ) ) with a physical disability ( spinal cord injury , multiple sclerosis , spina bifida , cerebral palsy , stroke , or lupus ) were randomized to one of three conditions : physical activity only ( POWERS ) , physical activity plus nutrition ( POWERS ( plus ) ) , and control .