Muscle Contraction Adaptations in Top-Level Karate Athletes Assessed by Tensiomyography.
| Autor: | Jeknić V; Palms Sports, Abu Dhabi P.O. Box 111188, United Arab Emirates.; Department of Sport, Abu Dhabi Police College, Abu Dhabi P.O. Box 111188, United Arab Emirates., Dopsaj M; Faculty of Sport and Physical Education, University of Belgrade, 11030 Belgrade, Serbia., Toskić L; Faculty of Sport and Physical Education, University in Priština-Kosovska Mitrovica, 38218 Leposavić, Serbia.; Faculty of Sport, University 'Union-Nikola Tesla', 11000 Belgrade, Serbia., Koropanovski N; Department of Criminalistics, University of Criminal Investigation and Police Studies, 11080 Belgrade, Serbia. |
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| Jazyk: | angličtina |
| Zdroj: | International journal of environmental research and public health [Int J Environ Res Public Health] 2022 Aug 19; Vol. 19 (16). Date of Electronic Publication: 2022 Aug 19. |
| DOI: | 10.3390/ijerph191610309 |
| Abstrakt: | Background: This paper aimed to compare the involuntary stimulated neuromuscular response of thigh muscles in top-level karate athletes and recreational groups. Methods: The study included 13 male karate athletes (KAs) and 14 non-athlete male individuals (NAs). Tensiomyographic (TMG) measurements were obtained from the rectus femoris (RF), vastus medialis (VM), vastus lateralis (VL), biceps femoris (BF) and semitendinosus (ST). Results: Statistically significant differences were observed between KAs and NAs in knee extensor/flexor delay time (Td), contraction time (Tc), total contraction time (Tct), maximal radial displacement of the muscle belly (Dm) and rate of muscle tension development (RMTD). On a group level, KA dominant-leg extensors and flexors and also non-dominant-leg knee flexors had significant differences when compared to NA. Tct is a TMG parameter in which the KAs and NAs differ the most in the case of the knee extensors, while flexor muscles differ the most in the RMTD parameter. Conclusions: The lower Tct values indicate an improved ability of top-level karateka to make fast contractions of the agonist muscles. KAs' higher RMTD values suggest on strength characteristics needed in breaking actions of the antagonist muscles. Existence of contraction-relaxation-contraction neuromuscular pattern in the RF muscle suggests on implementation of training strategies that involves both rapid muscle contractions and relaxations. |
| Databáze: | MEDLINE |
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