Effects of Concurrent Aerobic and Resistance Circuit Exercise on Acute Energy Expenditure during Perceptually Based exercise in Obese Adults

Abstract

Previous studies suggest that progressive accommodating circuit exercise (PACE) composed of aerobic exercise and hydraulic resistance exercise improve cardiorespiratory fitness, muscular strength, and body composition. However, it is not well known whether or not PACE could produce higher energy expenditure (EE) compared to other aerobic exercises. PURPOSE: To assess whether there is a difference in acute EE when obese people perform the PACE and aerobic exercise at a self-selected intensity corresponding to a target RPE 13. METHODS: Nine healthy women (% body fat; 30.3±1.4) aged 22-49 years were recruited for this study. All subjects completed 17 min. PACE and 15 min. cycle exercise. Ten individual exercise stations were designed to perform resistance exercise and 10 aerobic dancing boards were arranged alternatively in a circular manner. Oxygen consumption (VO2), heart rate (HR), respiratory exchange ratio (RER) and EE were measured by portable Vmax ST (Leipzig, Germany) during exercise. RESULTS: The maximal oxygen consumption (VO2max) and maximal heart rate (HRmax) were 30.3±1.5 and 180±3.6, respectively. Mean RER, VO2, HR, and EE were significantly higher in PACE than those of cycle exercise at a same RPE 13. These results also indicated that subjects self selected higher exercise intensity on the PACE, compared to the cycle exercise.TableCONCLUSIONS: This study suggests that the PACE could provide more calories compared with alternative aerobic exercise. Although there is a small differences in EE observed within this present study, when accumulated over months and years of exercise training, the energy difference could significantly impact weight loss.