Minimal Resistance Training Improves Daily Energy Expenditure and Fat Oxidation

Department of Kinesiology & Health Education, Southern Illinois University, Edwardsville, IL 62026, USA.
Medicine and science in sports and exercise (Impact Factor: 3.98). 04/2009; 41(5):1122-9. DOI: 10.1249/MSS.0b013e318193c64e
Source: PubMed


Long-term resistance training (RT) may result in a chronic increase in 24-h energy expenditure (EE) and fat oxidation to a level sufficient to assist in maintaining energy balance and preventing weight gain. However, the impact of a minimal RT program on these parameters in an overweight college-aged population, a group at high risk for developing obesity, is unknown.
We aimed to evaluate the effect of 6 months of supervised minimal RT in previously sedentary, overweight (mean +/- SEM, BMI = 27.7 +/- 0.5 kg x m(-2)) young adults (21.0 +/- 0.5 yr) on 24-h EE, resting metabolic rate (RMR), sleep metabolic rate (SMR), and substrate oxidation using whole-room indirect calorimetry 72 h after the last RT session.
Participants were randomized to RT (one set, 3 d x wk(-1), three to six repetition maximums, nine exercises; N = 22) or control (C, N = 17) groups and completed all assessments at baseline and at 6 months.
There was a significant (P < 0.05) increase in 24-h EE in the RT (527 +/- 220 kJ x d(-1)) and C (270 +/- 168 kJ x d(-1)) groups; however, the difference between groups was not significant (P = 0.30). Twenty-four hours of fat oxidation (g x d(-1)) was not altered after RT; however, reductions in RT assessed during both rest (P < 0.05) and sleep (P < 0.05) suggested increased fat oxidation in RT compared with C during these periods. SMR (8.4 +/- 8.6%) and RMR (7.4 +/- 8.7%) increased significantly in RT (P < 0.001) but not in C, resulting in significant (P < 0.001) between-group differences for SMR with a trend for significant (P = 0.07) between-group differences for RMR.
A minimal RT program that required little time to complete (11min per session) resulted in a chronic increase in energy expenditure. This adaptation in energy expenditure may have a favorable impact on energy balance and fat oxidation sufficient to assist with the prevention of obesity in sedentary, overweight young adults, a group at high risk for developing obesity.

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    • "Overweight and obesity have increased in the young adult population in many countries over the last three decades and is a leading public health concern (Ogden et al., 2012). Some weight loss/weight maintenance interventions have proven successful for young adults of 18-24 years old (Donnelly et al., 2003; Eiben and Lissner, 2006; Kirk et al., 2009); however, few weight loss/weight maintenance interventions are specifically designed for college students. This may be a concern since over half of US 18-24 year old young adults attend college and over 30 percent are overweight or obese (American College Health Association, 2013). "
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