BACKGROUND: Weakness of the rotator cuff muscles can lead to imbalances in the strength of shoulder external and internal rotators, change the biomechanics of the glenohumeral joint and predispose an athlete to injury. Transcranial direct current stimulation (tDCS) is a non-invasive brain stimulation technique that has demonstrated promising results in a variety of health conditions. However few studies addressed its potential approach in the realm of athletics. HYPOTHESIS/ PURPOSE: The purpose of this study was to investigate if transcranial direct current stimulation (tDCS) technique increases the isometric muscle strength of shoulder external and internal rotators in handball athletes. STUDY DESIGN: Randomized, double-blind, placebo-controlled, crossover study. METHODS: Eight female handball players aged between 17 and 21 years (Mean=19.65; SD=2.55) with 7.1 ± 4.8 years of experience in training, participating in regional and national competitions were recruited. Maximal voluntary isometric contraction (MVIC) of shoulder external and internal rotator muscles was evaluated during and after 30 and 60 minutes post one session of anodal and sham current (2mA; 0.057mA/cm2) with a one-week interval between stimulations. RESULTS: Compared to baseline, MVIC of shoulder external and internal rotators significantly increased after real but not sham tDCS. Between-group differences were observed for external and internal rotator muscles. Maximal voluntary isometric contraction of external rotation increased significantly during tDCS, and 30 and 60 minutes post-tDCS for real tDCS compared to that for sham tDCS. For internal rotation MVIC increased significantly during and 60 minutes post-tDCS. CONCLUSIONS: The results indicate that transcranial direct current stimulation temporarily increases maximal isometric contractions of the internal and external rotators of the shoulder in handball players. LEVEL OF EVIDENCE: 2.
BACKGROUND: Weakness of the rotator cuff muscles can lead to imbalances in the strength of shoulder external and internal rotators, change the biomechanics of the glenohumeral joint and predispose an athlete to injury. Transcranial direct current stimulation (tDCS) is a non-invasive brain stimulation technique that has demonstrated promising results in a variety of health conditions. However few studies addressed its potential approach in the realm of athletics. HYPOTHESIS/ PURPOSE: The purpose of this study was to investigate if transcranial direct current stimulation (tDCS) technique increases the isometric muscle strength of shoulder external and internal rotators in handball athletes. STUDY DESIGN: Randomized, double-blind, placebo-controlled, crossover study. METHODS: Eight female handball players aged between 17 and 21 years (Mean=19.65; SD=2.55) with 7.1 ± 4.8 years of experience in training, participating in regional and national competitions were recruited. Maximal voluntary isometric contraction (MVIC) of shoulder external and internal rotator muscles was evaluated during and after 30 and 60 minutes post one session of anodal and sham current (2mA; 0.057mA/cm2) with a one-week interval between stimulations. RESULTS: Compared to baseline, MVIC of shoulder external and internal rotators significantly increased after real but not sham tDCS. Between-group differences were observed for external and internal rotator muscles. Maximal voluntary isometric contraction of external rotation increased significantly during tDCS, and 30 and 60 minutes post-tDCS for real tDCS compared to that for sham tDCS. For internal rotation MVIC increased significantly during and 60 minutes post-tDCS. CONCLUSIONS: The results indicate that transcranial direct current stimulation temporarily increases maximal isometric contractions of the internal and external rotators of the shoulder in handball players. LEVEL OF EVIDENCE: 2.
Entities:
Keywords:
Isometric contraction; Transcranial direct current stimulation (tDCS); handball; shoulder rotator muscles
Authors: Andrea Antal; Bruce Luber; Anna-Katharine Brem; Marom Bikson; Andre R Brunoni; Roi Cohen Kadosh; Veljko Dubljević; Shirley Fecteau; Florinda Ferreri; Agnes Flöel; Mark Hallett; Roy H Hamilton; Christoph S Herrmann; Michal Lavidor; Collen Loo; Caroline Lustenberger; Sergio Machado; Carlo Miniussi; Vera Moliadze; Michael A Nitsche; Simone Rossi; Paolo M Rossini; Emiliano Santarnecchi; Margitta Seeck; Gregor Thut; Zsolt Turi; Yoshikazu Ugawa; Ganesan Venkatasubramanian; Nicole Wenderoth; Anna Wexler; Ulf Ziemann; Walter Paulus Journal: Clin Neurophysiol Pract Date: 2022-05-25
Authors: Francisco Gurdiel-Álvarez; Yeray González-Zamorano; Sergio Lerma Lara; Julio Gómez-Soriano; Julian Taylor; Juan Pablo Romero; María Gómez Jiménez; Josué Fernández-Carnero Journal: Brain Sci Date: 2021-02-04
Authors: Abrahão Fontes Baptista; Ana Mércia B L Fernandes; Katia Nunes Sá; Alexandre Hideki Okano; André Russowsky Brunoni; Argelia Lara-Solares; Aziza Jreige Iskandar; Carlos Guerrero; César Amescua-García; Durval Campos Kraychete; Egas Caparelli-Daquer; Elias Atencio; Fabián Piedimonte; Frantz Colimon; Fuad Ahmed Hazime; João Batista S Garcia; John Jairo Hernández-Castro; José Alberto Flores Cantisani; Kátia Karina do Monte-Silva; Luis Claudio Lemos Correia; Manuel Sempértegui Gallegos; Marco Antonio Marcolin; María Antonieta Ricco; María Berenguel Cook; Patricia Bonilla; Pedro Schestatsky; Ricardo Galhardoni; Valquíria Silva; William Delgado Barrera; Wolnei Caumo; Didier Bouhassira; Lucy S Chipchase; Jean-Pascal Lefaucheur; Manoel Jacobsen Teixeira; Daniel Ciampi de Andrade Journal: Pain Rep Date: 2019-01-09