Systemic glucose level changes with a carbohydrate-restricted and higher protein diet combined with exercise.

Objective: The authors' purpose in this study was to compare the effects of macronutrient intake on systemic glucose levels in previously sedentary participants who followed 1 of 4 diets that were either higher protein or high carbohydrate, while initiating an exercise program.

Participants And Methods: The authors randomly assigned 94 sedentary participants to 1 of 4 diet groups consisting of Diet 1 (55% carbohydrate, 30% fat, 15% protein), Diet 2 (55% carbohydrate, 30% fat, 15% protein and caloric restriction), Diet 3 (40% carbohydrate, 30% fat, 25% protein), and Diet 4 (40% carbohydrate, 30% fat, 25% protein and caloric restriction) and followed recommended aerobic exercise prescriptions.

Results: Repeated measures analyses of variance (ANOVA) revealed a significant time factor (p=.