Resistance and aerobic exercise have similar effects on 24-h nutrient oxidation.
BACKGROUND
Whether resistance exercise is as effective as aerobic exercise for body-weight management is debated.


OBJECTIVE
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, subjects exercised for 49 +/- 7 min (mean +/- SEM) at 70% of OV(2max) and expended 546 +/- 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 +/- 21 kcal (P < 0.001 vs BK). 24-h EE on BK and WTS days (2,787 +/- 76 kcal x d(-1), 2,730 +/- 106 kcal x d(-1), respectively, P > 0.05) was elevated compared with Con (2,260 +/- 96 kcal x d(-1), P < 0.001), but 24-h respiratory exchange ratio (RER) was not different. 24-h carbohydrate oxidation was significantly elevated on the exercise days (BK = 370 +/- 18 g x d(-1), WTS = 349 +/- 23 g x d(-1), P > 0.05) compared with Con (249 +/- 29 g x d(-1), P = 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.


CONCLUSIONS
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.
Melanson
Edward L
EL
Center for Human Nutrition, University of Colorado Health Sciences Center, Denver, 80262, USA. Ed.melanson@uchsc.edu
Sharp
Teresa A
TA
Seagle
Helen M
HM
Donahoo
William T
WT
Grunwald
Gary K
GK
Peters
John C
JC
Hamilton
Jere T
JT
Hill
James O
JO
D000328:Adult; D015308:Anaerobic Threshold / Q000502:physiology; D001823:Body Composition; D015992:Body Mass Index; D002153:Calorimetry, Indirect; D050260:Carbohydrate Metabolism; D004734:Energy Metabolism / Q000502:physiology*; D015444:Exercise / Q000502:physiology*; D005223:Fats / Q000378:metabolism; D006801:Humans; D008297:Male; D010084:Oxidation-Reduction; D010807:Physical Endurance / Q000502:physiology; D005082:Physical Exertion / Q000502:physiology*; D011446:Prospective Studies; D011506:Proteins / Q000378:metabolism; D012016:Reference Values; D012494:Sampling Studies; D012680:Sensitivity and Specificity; D014891:Weight Lifting / Q000502:physiology*
D005223:Fats; D011506:Proteins