Effect of Athletic Training on Fatigue During Neuromuscular Electrical Stimulation.

Autor:	Abitante TJ; Harvard-MIT Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA, United States.; The Charles Stark Draper Laboratory, Inc., Cambridge, MA, United States., Rutkove SB; Department of Neurology, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA, United States., Duda KR; The Charles Stark Draper Laboratory, Inc., Cambridge, MA, United States., Newman DJ; MIT Media Lab, Department of Aeronautics and Astronautics, Massachusetts Institute of Technology, Cambridge, MA, United States.
Jazyk:	angličtina
Zdroj:	Frontiers in sports and active living [Front Sports Act Living] 2022 Jun 14; Vol. 4, pp. 894395. Date of Electronic Publication: 2022 Jun 14 (Print Publication: 2022).
DOI:	10.3389/fspor.2022.894395
Abstrakt:	The purpose of this study was to explore the effect an individual's exercise training type will have on muscle fatigability during repetitive contractions induced by Neuromuscular Electrical Stimulation (NMES). Thirty-four subjects comprising of competitive athletes and controls were recruited into three cohorts: Endurance (runners/cyclists) n = 13; nine male, four female; 27 ± 8 years old, Explosive (Lifters/Sprinters) n = 11; nine male, two female; 30 ± 7 years old, and controls n = 10, six male, four female, 26 ± 4 years old. Subjects were placed in a custom-made leg extension rig, and received NMES against a fixed resistance (NMES-FR), to the Vastus Medialis muscle resulting in isometric leg extensions, at a duty cycle of 1 s on/3 s rest, for 20 min. The force of the isometric contractions was recorded using a Hogan MicroFet2 dynamometer, and three separate fatigue metrics were calculated to compare the different cohorts, sports within each cohort, and gender within each cohort. For every fatigue metric, the endurance group fatigued significantly less than both the explosive and control cohorts, with no difference observed between the explosive and the controls. Within each cohort, no significant difference was observed in any fatigue metric between sport or gender, but these comparisons lacked power. The results show that only high capacity endurance activity will have any effect on reducing one's fatigability during repetitive NMES. The implications of this conclusion can aid in the development of NMES regimens for use in healthy populations, such as athletic training or astronaut musculoskeletal countermeasures, as well as clinical applications when fatigue is to be minimized. Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. (Copyright © 2022 Abitante, Rutkove, Duda and Newman.)
Databáze:	MEDLINE
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