Ninety-two overweight/obese ( body mass index , 25-39 .9 kgm ) sedentary young adults ( 18-30 yr ) completed a 10-month randomized clinical efficacy trial of aerobic exercise 5 dwk at either 400 kcal per session ( n = 37 ) , 600 kcal per session ( n = 37 ) , or control ( n = 18 ) .