Fenfen Zhou1,2,3, Xiaojian Yin4, Kilian Phillipe5, Aya Houssein6,7, Steven Gastinger6,8, Jacques Prioux6,7. 1. Sino-French Joint Research Center of Sport Science, College of Physical Education and Health, East China Normal University, Shanghai, China. fenfen.zhou@ens-rennes.fr. 2. Laboratoire Mouvement, Sport, Santé (EA 7470), Université de Rennes, 2, Avenue Robert Schuman, 35170, Bruz, France. fenfen.zhou@ens-rennes.fr. 3. Département Sciences du Sport et Éducation Physique, Ecole Normale Supérieure de Rennes, Campus de Ker Lann, Avenue Robert Schuman, 35170, Bruz, France. fenfen.zhou@ens-rennes.fr. 4. Sino-French Joint Research Center of Sport Science, College of Physical Education and Health, East China Normal University, Shanghai, China. 5. Laboratory of Movement, Balance, Performance and Health (MEPS, EA-4445), University of Pau and Pays de l'Adour, Tarbes, France. 6. Laboratoire Mouvement, Sport, Santé (EA 7470), Université de Rennes, 2, Avenue Robert Schuman, 35170, Bruz, France. 7. Département Sciences du Sport et Éducation Physique, Ecole Normale Supérieure de Rennes, Campus de Ker Lann, Avenue Robert Schuman, 35170, Bruz, France. 8. APCoSS, Institut de Formation en Education Physique et en Sport d'Angers, (IFEPSA), Les Ponts de Cé, France.
Abstract
PURPOSE: To identify the changes of ventilation ([Formula: see text]E), tidal volume (VT) and respiratory frequency (fr) at different incremental step test intensities during maturation of children and adolescents. METHODS: A semi-longitudinal study was conducted on 68 healthy untrained boys and girls aged 11-17 years. The subjects were separated into three distinct age groups. [Formula: see text]E, VT and fr parameters were evaluated annually during 3 years by modifying incremental step test intensities according to ventilatory threshold (VTh) level (30, 60 and 90% of [Formula: see text]O2max). Absolute and relative values of ventilatory responses were analyzed and compared according to age and developmental phase. RESULTS: (1) Height, weight, lean body mass and vital capacity increased significantly from 11 to 17 years of age. (2) [Formula: see text]O2max, [Formula: see text]E, and VT increased during maturation even when exercise intensity changed, especially from 11 to 15 years of age. On the other hand, fr showed a decreasing trend. CONCLUSION: Increases of VT are the main reason for [Formula: see text]E increases during maturation of children. fr decreased independently of total body mass during maturation. [Formula: see text]E.kg-1 was stable despite intensity variations. VT.kg-1 increased significantly from 11 to 15 years then stabilized at 17 years. Lean body mass seems to explain the evolution of VT.kg-1 during maturation.
PURPOSE: To identify the changes of ventilation ([Formula: see text]E), tidal volume (VT) and respiratory frequency (fr) at different incremental step test intensities during maturation of children and adolescents. METHODS: A semi-longitudinal study was conducted on 68 healthy untrained boys and girls aged 11-17 years. The subjects were separated into three distinct age groups. [Formula: see text]E, VT and fr parameters were evaluated annually during 3 years by modifying incremental step test intensities according to ventilatory threshold (VTh) level (30, 60 and 90% of [Formula: see text]O2max). Absolute and relative values of ventilatory responses were analyzed and compared according to age and developmental phase. RESULTS: (1) Height, weight, lean body mass and vital capacity increased significantly from 11 to 17 years of age. (2) [Formula: see text]O2max, [Formula: see text]E, and VT increased during maturation even when exercise intensity changed, especially from 11 to 15 years of age. On the other hand, fr showed a decreasing trend. CONCLUSION: Increases of VT are the main reason for [Formula: see text]E increases during maturation of children. fr decreased independently of total body mass during maturation. [Formula: see text]E.kg-1 was stable despite intensity variations. VT.kg-1 increased significantly from 11 to 15 years then stabilized at 17 years. Lean body mass seems to explain the evolution of VT.kg-1 during maturation.
Authors: Danielle S Burstein; Michael G McBride; Jungwon Min; Alexander A Paridon; Sarah Perelman; Erika M Huffman; Shannon O'Malley; Julia Del Grosso; Herman Groepenhoff; Stephen M Paridon; Julie A Brothers Journal: J Pediatr Date: 2020-09-11 Impact factor: 4.406