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Article

The Symmetry of Fatigue of Lower Limb Muscles in 400 m Run Based on Electromyography Signals

Department of Biomedical Sciences, Faculty of Physical Education, Józef Piłsudski University of Physical Education in Warsaw, Marymoncka 34, 00-968 Warsaw, Poland
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Academic Editor: Robert Sainburg
Symmetry 2021, 13(9), 1698; https://doi.org/10.3390/sym13091698 (registering DOI)
Received: 5 August 2021 / Revised: 3 September 2021 / Accepted: 9 September 2021 / Published: 14 September 2021
(This article belongs to the Special Issue New Insights into Motion Analysis)
Background: This study assesses curved track effects on fatigue symmetry and lower limb muscle activity while taking maximum velocity running kinematics into account. Methods: Polish master class athletes were examined (age 24.6 ± 3.67 years, bm 78.9 ± 6.02 kg, and bh 186.1 ± 6.63 cm). The measurements were made on a 400 m synthetic surface athletics track. The DelSys 16 channel system was employed to measure the activity of the right and left leg muscles. The kinematic variables of the run were obtained using a 3-axis accelerometer built into the recorder. Results: The study revealed curved track effects on asymmetric muscle activity and running kinematics in the first two sections of the run. On the first curve, the symmetry index (SI) was 8.1%, while in on straight, it was 11.5%. Moreover, significantly lower values of the fatigue index b were found for the right limb (F(3.36) = 6.504; p = 0.0152). Conclusions: A reduction of asymmetric muscle activity is linked with compensatory muscle stimulation triggered by the nervous system and with adjusting running kinematics to changing external conditions. Therefore, the main focus further research should be on the optimal interaction between stride length and frequency in relation to the muscle activity corresponding to the track geometry. View Full-Text
Keywords: electromyography; fatigue; symmetry; run electromyography; fatigue; symmetry; run
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MDPI and ACS Style

Iwańska, D.; Tabor, P.; Grabowska, O.; Mastalerz, A. The Symmetry of Fatigue of Lower Limb Muscles in 400 m Run Based on Electromyography Signals. Symmetry 2021, 13, 1698. https://doi.org/10.3390/sym13091698

AMA Style

Iwańska D, Tabor P, Grabowska O, Mastalerz A. The Symmetry of Fatigue of Lower Limb Muscles in 400 m Run Based on Electromyography Signals. Symmetry. 2021; 13(9):1698. https://doi.org/10.3390/sym13091698

Chicago/Turabian Style

Iwańska, Dagmara, Piotr Tabor, Olga Grabowska, and Andrzej Mastalerz. 2021. "The Symmetry of Fatigue of Lower Limb Muscles in 400 m Run Based on Electromyography Signals" Symmetry 13, no. 9: 1698. https://doi.org/10.3390/sym13091698

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