inMale PatientsWith Type 2 Diabetes

OBJECTIVEdTo investigate the impact of activities of daily living (ADL) versus moderate-intensity endurance-type exercise on 24-h glycemic control in patients with type 2 diabetes. RESEARCH DESIGN AND METHODSdTwenty males with type 2 diabetes partici-pated in a randomized crossover study consisting of three experimental periods of 3 days each. Subjects were studied under sedentary control conditions, and under conditions in which pro-longed sedentary time was reduced either by three 15-min bouts of ADL (postmeal strolling,;3 METs) or by a single 45-min bout of moderate-intensity endurance-type exercise (;6 METs). Blood glucose concentrations were assessed by continuous glucose monitoring, and plasma insulin concentrations were determined in frequently sampled venous blood samples. RESULTSdHyperglycemia (glucose.10mmol/L) was experienced for 6 h 51min61 h 4min per day during the sedentary control condition and was significantly reduced by exercise (4 h 47 min6 1 h 2min; P, 0.001), but not by ADL (6 h 2min6 1 h 16min; P = 0.67). The cumulative glucose incremental areas under the curve (AUCs) of breakfast, lunch, and dinner were, respec-tively, 35 6 5 % (P, 0.001) and 17 6 6 % (P, 0.05) lower during the exercise and ADL conditions compared with the sedentary condition. The insulin incremental AUCs were, respec