Resistance and aerobic exercise have similar effects on 24-h nutrient oxidation
Medicine & Science in Sports & Exercise
Whether resistance exercise is as effective as aerobic exercise for body-weight management is debated. Purpose: To compare 24-h energy expenditure (EE) and macronutrient oxidation elicited by comparable bouts of stationary cycling (BK) and weightlifting (WTS). Methods: 24-h EE and macronutrient oxidation were measured in 10 nonobese male subjects on three occasions using whole-room indirect calorimetry. BK and WTS days were compared with a nonexercise control day (Con). Results: During BK,
... ts: During BK, subjects exercised for 49 Ϯ 7 min (mean Ϯ SEM) at 70% of V O 2max and expended 546 Ϯ 16 kcal. During WTS, subjects performed a 70-min circuit consisting of four sets of 10 different exercises at 70% of exercise-specific 1-repetition maximum and expended 448 Ϯ 21 kcal (P Ͻ 0.001 vs BK). 24-h EE on BK and WTS days (2787 Ϯ 76 kcal·d Ϫ1 , 2730 Ϯ 106 kcal·d Ϫ1 , respectively, P Ͼ 0.05) was elevated compared with Con (2260 Ϯ 96 kcal·d Ϫ1 , P Ͻ 0.001), but 24-h respiratory exchange ratio (RER) was not different. 24-h carbohydrate oxidation was significantly elevated on the exercise days (BK ϭ 370 Ϯ 18 g·d Ϫ1 , WTS ϭ 349 Ϯ 23 g·d Ϫ1 , P Ͼ 0.05) compared with Con (249 Ϯ 29 g·d Ϫ1 , P ϭ 0.04). 24-h fat and protein oxidation were the same on BK, WTS, and Con days. EE and macronutrient oxidation in the periods after exercise also did not differ across conditions. Conclusion: In men, resistance exercise has a similar effect on 24-h EE and macronutrient oxidation as a comparable bout of aerobic exercise. Neither exercise produced an increase in 24-h fat oxidation above that observed on a nonexercise control day.