Aerobic and Resistance Training Effects on Energy Intake: The STRRIDE AT/RT Study
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Abstract
Our study characterizes food and energy intake responses to long-term aerobic (AT) and resistance training (RT) during a controlled 8-month trial. Methods In the STRRIDE AT/RT trial, overweight/obese sedentary dyslipidemic men and women were randomized to AT (n = 39), RT (n = 38), or a combined treatment (AT/RT; n = 40) without any advice to change their food intakes. Quantitative food intake assessments (QDI) and food frequency questionnaires (FFQ) were collected at baseline (BEF) and after 8 mo. training (END); body mass (BM) and fat free mass (FFM) were also assessed. Results In AT and AT/RT, respectively, meaningful decreases in reported energy intake (REI) (−217 and −202 kcal; p < 0.001) and in intakes of fat (−14.9 and −14.9 g; p < 0.001, p = 0.004), protein (−8.3 and −10.7 g; p = 0.002, p < 0.001), and carbohydrate (−28.1 and −14.7 g; p = 0.001, p = 0.030) were found by FFQ. REI relative to FFM decreased (p < 0.001 and p=0.002) as did intakes of fat (−0.2 and −0.3 g; p = 0.003 and p = 0.014) and protein (−0.1 and −0.2 g; p = 0.005 and p < 0.001) in AT and AT/RT and carbohydrate (−0.5 g; p<0.003) in AT only. For RT, REI by QDI decreased (−3.0 kcal/kg FFM; p=0.046), as did fat intake (−0.2 g; p = 0.033). BM decreased in AT (−1.3 kg, p=0.006) and AT/RT (−1.5 kg, p = 0.001) but was unchanged (0.6 kg, p = 0.176) in RT. Conclusions Previously sedentary subjects completing 8 months of AT or AT/RT reduced their intakes of kcal and macronutrients and BM. In RT, fat intakes and REI (when expressed per FFM) decreased, BM was unchanged, and FFM increased.
