[논문]A comparison of trunk and lower extremity muscle activity during the performance of squats and kneeling squats in persons with stroke: a preliminary study

Shim, Suyoung; Chung, Yijung

doi:10.14474/ptrs.2019.8.2.86

A comparison of trunk and lower extremity muscle activity during the performance of squats and kneeling squats in persons with stroke: a preliminary study 원문보기

Physical therapy rehabilitation science, v.8 no.2, 2019년, pp.86 - 92

Shim, Suyoung (Department of Physical Therapy, IM Convalescent Hospital) , Chung, Yijung (Department of Physical Therapy, College of Health Science and Social Welfare, Sahmyook University)

Abstract ▼ AI-Helper

Objective: The purpose of this study was to compare the effects of performing squats and kneeling squats on trunk and lower extremity muscle activity in persons with stroke. Design: Cross-sectional study. Methods: Ten persons with stroke (3 male and 7 female) were recruited. The subjects were instructed to randomly perform the 4 different squat conditions: squat with 30 degrees of knee flexion, squat with 60 degrees of knee flexion, squat with 90 degree of knee flexion, and the kneeling squat. During the squat performance, surface electromyograms (sEMG) was used to assess muscle activity of the erector spinae (ES), gluteus maximus (Gmax), gluteus medius (Gmed), and biceps femoris (BF) muscles. Results: Muscle activation of the ES and BF were significantly increased with the kneeling squats compared to the general squats with 30 degrees and 60 degrees of knee flexion (p<0.05), and muscle activation of the Gmax and Gmed were significantly increased with the kneeling squats compared to all other squat conditions (p<0.05). Conclusions: The results suggest that the kneeling squat is an effective exercise to strengthen the proximal muscles of the lower extremities. Rather than applying a difficult general squat to the stroke population, the kneeling squat may be applied as a safer method for training the proximal muscles.

주제어

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문제 정의

This study is a cross-sectional study design. A total of 10 persons admitted at the IM Convalescent Hospital in Gyeonggido who were diagnosed with stroke and hemiplegia, were receiving physical therapy treatment, had met the study conditions and had agreed to participate in the study were included.
In such cases where squatting is difficult for the stroke survivor, the existing squat exercise can be modified so that it can be more easily applied within the clinical setting. This study is also an attempt to provide basic data in introducing an effective exercise method.

제안 방법

Prior to the experiment, the researchers explained about the squat movement using three different knee flexion angles as well as in the standing posture of the knee, and the subjects were allowed to practice the squats more than 3 times in order to enable them to fully understand the experimental method.
The purpose of this study was to investigate the effect of squat movement on the body and leg muscles when comparing the squat movement with the three knee joint flexion angles.
Therefore, this study was designed to investigate the effect of performing squats while standing on the knees and squats according to various knee joint angles, as well as to determine whether the modified squat movement is effective on the body and leg muscle activity.
While the subjects performed the squats according to various bending knee flexion angles and while standing on the knees, their muscle activation was assessed for 10 seconds total, and was repeated 3 times.
With electrodes applied onto the erector spinae, gluteus maximus, gluteus medius, and biceps femoris muscles, the peak muscle activation values were assessed while the subjects performed squats with three different knee flexion angles as well as while standing on the knees.

대상 데이터

For the surface electrode (Ag/AgCl, Single Electrode T246H; Bioprotech, Wonju, Korea), asingle-use adhesive electrodes were used.

이론/모형

MMSE-K: Korean version of the Mini-Mental State Examination.

성능/효과

The inclusion criteria for the participants were presence of hemiplegia due to stroke, the ability to walk more than 10 m independently without assistance, a score of 24 points or more on the Korean version of the Mini-Mental State Examination, and no visual defects or abnormalities in the vestibular system.
The results of this study showed that muscle activation while performing squats while standing on the knees and squats with 90° of knee flexion were higher than when performing squats with 30° and 60°.
This study compared the squat movement while standing on the knees and the squat movement performed according to the various knee flexion angles in persons with stroke and showed that it is possible that there may be differences in muscle activity of the proximal part of the muscle.
This study had a few limitations in that the sample size was small, the results cannot be compared with the unaffected side since the muscle activation of the affected side was investigated, the muscle activation was not normalized but rather the peak values were obtained.

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