Pediatric Obesity and Perceived Exertion: Difference Between Weight-Bearing and Non-Weight-Bearing Exercises Performed at Different Intensities |
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Authors: | D Thivel L Isacco G O’Malley P Duché |
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Institution: | 1. Laboratory of the Metabolic Adaptations to Exercise under Physiological and Pathological Conditions (AME2P), Clermont University, Blaise Pascal University, EA 3533, Aubière Cedex, FranceDavid.Thivel@univ-bpclermont.fr;3. Laboratory Culture Sport Health Society, EA 4660, and Exercise Performance, Health, Innovation Platform, Franche-Comte University, Besan?on, France;4. Physiotherapy Department, Temple Street Children’s University Hospital, Dublin, Ireland;5. Laboratory of the Metabolic Adaptations to Exercise under Physiological and Pathological Conditions (AME2P), Clermont University, Blaise Pascal University, EA 3533, Aubière Cedex, France |
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Abstract: | Excess body weight composes an important limitation to exercise in obese youth. The aim of this study was to compare the perceived exertion of obese adolescents between weight-bearing (WB; running) and non-weight-Bearing (NWB; cycling) exercises performed at moderate (55%VO2max) and high (75%VO2max) intensities. Twenty-four obese adolescents were recruited. After assessment of their body composition and physical capacities, they had to complete four isoenergetic exercise sessions: (1) a cycling session performed at 55% of their maximal capacities (NWB-55%); (2) a cycling session set at 75% (NWB-75%); (3) a running session at 55% (WB-55%); and (4) a running session at 75% (WB-75%). Perceived exertion was assessed using a visual scale at regular interval. While no significant difference between WB and NWB modalities was observed, the adolescents expressed a significantly lower rate of perceived exertion (RPE) during exercises at 55%VO2max (P < 0.0001). An intensity × modality interaction revealed that RPE was lower at 75% VO2max during NWB exercises (P < 0.05). While obese adolescents expressed lower RPE during exercise at moderate intensity whatever its modality, low level of perceived exertion has been observed during high-intensity exercises and especially during NWB. High-intensity exercise appears well tolerated in adolescents when their body weight is supported. |
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Keywords: | paediatric obesity exercise modality exercise intensity perceived exertion |
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