Sebastian Garcia-Vicencio1, Vincent Martin1, Virginie Kluka1, Charlotte Cardenoux2, Anne-Gaëlle Jegu2, Anne-Véronique Fourot3, Emmanuel Coudeyre2, Sébastien Ratel4. 1. EA 3533, Laboratory of Metabolic Adaptations During Exercise in Physiological and Pathological Conditions (AME2P), Clermont Auvergne University, Blaise Pascal University, BP 10448, 63000, Clermont-Ferrand, France. 2. Clermont University Hospital, Clermont-Ferrand, France. 3. MECSS Tza Nou, La Bourboule, France. 4. EA 3533, Laboratory of Metabolic Adaptations During Exercise in Physiological and Pathological Conditions (AME2P), Clermont Auvergne University, Blaise Pascal University, BP 10448, 63000, Clermont-Ferrand, France. sebastien.ratel@univ-bpclermont.fr.
Abstract
PURPOSE: The aim of this study was to investigate the effect of obesity on neuromuscular fatigue in adolescent girls. METHODS: Twelve lean (13.6 ± 0.8 years) and 12 obese (13.9 ± 0.9 years) girls repeated 5-s maximal voluntary contractions (MVC) of the knee extensors until the generated torque reached 55 % of its initial value. Magnetic stimulations were delivered to the femoral nerve every five MVCs to follow the course of voluntary activation (VA) and potentiated twitch torque (Qtwpot). RESULTS: Torque reached 55 % of its initial value after 52.6 ± 20.4 and 74.9 ± 22.8 repetitions in obese and lean girls, respectively (p < 0.01). Furthermore, the decline of VA was smaller in obese girls (p < 0.001). In contrast, Qtwpot decreased to a greater extent in obese girls (p < 0.05). CONCLUSIONS: Obese girls fatigue faster than their lean counterparts. The peripheral factors mainly account for fatigue in obese girls, whereas central factors are mainly involved in lean girls.
PURPOSE: The aim of this study was to investigate the effect of obesity on neuromuscular fatigue in adolescent girls. METHODS: Twelve lean (13.6 ± 0.8 years) and 12 obese (13.9 ± 0.9 years) girls repeated 5-s maximal voluntary contractions (MVC) of the knee extensors until the generated torque reached 55 % of its initial value. Magnetic stimulations were delivered to the femoral nerve every five MVCs to follow the course of voluntary activation (VA) and potentiated twitch torque (Qtwpot). RESULTS: Torque reached 55 % of its initial value after 52.6 ± 20.4 and 74.9 ± 22.8 repetitions in obese and lean girls, respectively (p < 0.01). Furthermore, the decline of VA was smaller in obesegirls (p < 0.001). In contrast, Qtwpot decreased to a greater extent in obesegirls (p < 0.05). CONCLUSIONS:Obese girls fatigue faster than their lean counterparts. The peripheral factors mainly account for fatigue in obesegirls, whereas central factors are mainly involved in lean girls.
Entities:
Keywords:
Adolescence; Central fatigue; Electromyography; Peripheral fatigue; Peripheral magnetic stimulation
Authors: Cristiane A Moran; Maria Stella Peccin; Maria Teresa Bombig; Silvana Alves Pereira; Simone Dal Corso Journal: BMC Pediatr Date: 2017-03-09 Impact factor: 2.125
Authors: Guillermo Mendez-Rebolledo; Eduardo Guzman-Muñoz; Rodrigo Ramírez-Campillo; Pablo Valdés-Badilla; Carlos Cruz-Montecinos; Juan Morales-Verdugo; Francisco Jose Berral de la Rosa Journal: PeerJ Date: 2019-06-25 Impact factor: 2.984