Low Cardiorespiratory Fitness is Partially Linked to Ventilatory Factors in Obese Adolescents.

Autor:	Mendelson, Monique, Michallet, Anne-Sophie, Tonini, Julia, Favre-Juvin, Anne, Guinot, Michel, Wuyam, Bernard, Flore, Patrice
Předmět:	ACTIVE oxygen in the body ANALYSIS of variance CARDIOPULMONARY system CHI-squared test STATISTICAL correlation CYCLING DYSPNEA EXERCISE EXERCISE tests HEART beat LONGITUDINAL method CHILDHOOD obesity OXIMETRY PHYSICAL fitness PROBABILITY theory PULMONARY gas exchange RESPIRATION RESPIRATORY measurements STATISTICS T-test (Statistics) PULSE oximeters DATA analysis AEROBIC capacity BODY mass index VISUAL analog scale REPEATED measures design OXYGEN consumption ERGOMETRY VITAL capacity (Respiration) DATA analysis software WAIST circumference DESCRIPTIVE statistics MANN Whitney U Test
Zdroj:	Pediatric Exercise Science; Feb2016, Vol. 28 Issue 1, p87-97, 11p, 3 Charts, 4 Graphs
Abstrakt:	Aim: To examine the role of ventilatory constraint on cardiorespiratory fitness in obese adolescents. Methods: Thirty obese adolescents performed a maximal incremental cycling exercise and were divided into 2 groups based on maximal oxygen uptake (VO2peak): those presenting low (L; n = 15; VO2peak: 72.9 ± 8.6% predicted) or normal (N;B= 15; VO2peak: 113.6 ± 19.2% predicted) cardiorespiratory fitness. Both were compared with a group of healthy controls (C; n = 20; VO2peak: 103.1 ± 11.2% predicted). Ventilatory responses were explored using the flow volume loop method. Results: Cardiorespiratory fitness (VO2peak. in % predicted) was lower in L compared with C and N and was moderately associated with the percent predicted forced vital capacity (FVC) (r = .52; p < .05) in L. At peak exercise, end inspiratory point was lower in L compared with N and C (77.4 ±8.1, 86.4 ± 7.7, and 89.9 ± 7.6% FVC in L, N, and C, respectively; p < .05), suggesting an increased risk of ventilatory constraint in L, although at peak exercise this difference could be attributed to the lower maximal ventilation in L. Conclusion: Forced vital capacity and ventilatory strategy to incremental exercise slightly differed between N and L. These results suggest a modest participation of ventilatory factors to exercise intolerance. [ABSTRACT FROM AUTHOR]
Databáze:	Complementary Index
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