The rating of perceived exertion is not different at the ventilatory threshold in sedentary women with different body mass indices

Publication date: December 2013 Source:Journal of Exercise Science & Fitness, Volume 11, Issue 2 Author(s): Hassan Mohamed Elsangedy , Kleverton Krinski , Eduardo Caldas Costa , Luke Haile , Andre Igor Fonteles , Luciana da Silva Timossi , Sergio Gregorio da Silva The ventilatory threshold (VT), or respiratory compensation point, is an important respiratory-metabolic marker of aerobic fitness. Exercise at VT intensity provides an optimal stimulus for body mass loss and improvement in aerobic fitness. The use of ratings of perceived exertion (RPE) to self-regulate exercise intensity is more feasible than prescribing exercise using oxygen consumption ( V ˙ O 2 ) and heart rate (HR). Identifying RPE at the VT (RPEVT) is an optimal intensity target for perceptually regulated exercise. The aim of this study was to compare the RPEVT among normal body mass, overweight, and obese sedentary women, according to body mass index (BMI). Each participant performed a maximal graded treadmill test, where RPE, pulmonary ventilation, V ˙ O 2 , carbon dioxide output, and HR were monitored, and VT was determined. The RPEVT was identified as the RPE estimated during the minute the VT occurred. V ˙ O 2 , percentage of maximal V ˙ O 2 ( % V ˙ O 2 max ) , and percentage of maximal HR (%HRmax) at the VT and RPEVT were compared among groups using analysis of variance. Obese women exhibited lower V ˙ O 2 , ...
Source: Journal of Exercise Science and Fitness - Category: Sports Medicine Source Type: research