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EMG for the Ratio of the Vastus Lateralis and Vastus Medialis in Treadmill Running

Health Sciences Research
Vol.4 , No. 6, Publication Date: Nov. 16, 2017, Page: 72-75

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Authors

[1]	Keiichi Tsuji, Division of Physical Therapy, Department of Rehabilitation, Heisei College of Health Sciences, Kurono, Gifu, Gifu, Japan.
[2]	Hiroyasu Ishida, Division of Physical Therapy, Department of Rehabilitation, Heisei College of Health Sciences, Kurono, Gifu, Gifu, Japan.
[3]	Yuichiro Fujihashi, Division of Physical Therapy, Department of Rehabilitation, Heisei College of Health Sciences, Kurono, Gifu, Gifu, Japan.
[4]	Tsutomu Ueki, Division of Physical Therapy, Department of Rehabilitation, Heisei College of Health Sciences, Kurono, Gifu, Gifu, Japan.
[5]	Yoshihito Tajima, Division of Physical Therapy, Department of Rehabilitation, Heisei College of Health Sciences, Kurono, Gifu, Gifu, Japan.
[6]	Kaori Oba, Division of Physical Therapy, Department of Rehabilitation, Heisei College of Health Sciences, Kurono, Gifu, Gifu, Japan.

Abstract

To compare the changes in muscle activity with changes in running speed using the activity ratio of the vastus medialis (VM) and vastus lateralis (VL) muscles. The subjects performed on the treadmill at speeds of 6 km/h, 9 km/h, and 12 km/h. Their myogenic potentials were measured after 5 minutes of running for 30 seconds. The order of running speed was chosen at random. Ten running cycles in 30 seconds were selected. The measured myogenic potential data of VM were divided by those of VL (VM/VL). The average VM/VL %MVCs were compared to those during walking and during running at 6, 9, and 12 km/h, with significant differences between the average VM/VL %MVC at 6 (2.4±0.7) km/h and at 9 (1.0±0.1) and 12 (1.0±0.1) km/h. The average VM/VL %MVC values suggested that VM activity was dominant during walking and running at 6 km/h. During running at 9 and 12 km/h, there appeared to be no dominance, with equivalent VM and VL activity.

Keywords

Running, Electromyography, Skeletal Muscle

Reference

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