[논문]Effects of Different External Loads on the Activities of the Gluteus Maximus and Biceps Femoris during Prone Hip Extension in Healthy Young Men

Bae, Chang-Hwan; Choe, Yu-Won; Kim, Myoung-Kwon

doi:10.13066/kspm.2020.15.2.1

Effects of Different External Loads on the Activities of the Gluteus Maximus and Biceps Femoris during Prone Hip Extension in Healthy Young Men 원문보기

대한물리의학회지 = Journal of the korean society of physical medicine, v.15 no.2, 2020년, pp.1 - 9

Bae, Chang-Hwan (Bae Chang Hwan Training Center) , Choe, Yu-Won (Department of Rehabilitation Sciences, Graduate School, Daegu University) , Kim, Myoung-Kwon (Department of Physical Therapy, College of Rehabilitation Sciences, Daegu University)

Abstract ▼ AI-Helper

PURPOSE: This study examined the effects of different external loads on the muscle activities around the hip during prone hip extension with knee flexion (PHEKF) exercise in healthy young men. METHODS: Sixteen healthy adult males participated in the study. A pressure biofeedback unit was used to provide feedback to the participants during the abdominal drawing-in maneuver (ADIM) with PHEKF. Sandbags (0 kg, 1 kg, 2 kg, and 3 kg) were used to provide external resistance. The quadriceps was contracted to maintain knee flexion 90° against resistance. Each resistance condition using a sandbag weight was given in random order. Surface electromyography (sEMG) was used to measure the electrical activity of the gluteus maximus, biceps femoris, and erector spinae during PHEKF. RESULTS: The muscle activity of the gluteus maximus was highest with the 3 kg resistance and lowest with 0 kg (F = 128.46, P = .00). The muscle activities of the biceps femoris and erector spinae were highest with 0 kg and lowest with 3 kg (F = 29.49, P = .00). The muscle activity rate of the gluteus maximus/biceps femoris was highest with 3 kg and lowest with 0 kg (F = 37.49, P = .00). CONCLUSION: The activity of the gluteus maximus was increased using a higher external weight load during PHEKF, while the activity of the biceps femoris decreased. These findings suggest that an external weight is needed during hip extensor exercise to strengthen the gluteus maximus and inhibit the biceps femoris.

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문제 정의

On the other hand, few studies have examined the effects of the external weight loads on the muscle activities around hip during prone hip extension for selective strengthening of the gluteus maximus. Therefore, this study examined the effects of an external weight load on the muscle activities around the hip during prone hip extension with knee flexion (PHEKF) exercise.
This study examined the effects of external weight loads with PHEKF and ADIM on the muscle activities around the hip. The activity of the gluteus maximus increased with increasing external weight load during PHEKF while the activity of the biceps femoris decreased.

가설 설정

Excessive knee flexion has been considered a sign of hamstring over-activity [13,32,33]. In this study, weights to provide the quadriceps with resistance play a role in preventing hamstring activation. Neurophysiologically, the hamstring activity decreases during quadriceps contraction [34].

제안 방법

Fourth, there is the possibility of a measurement error of EMG. Finally, this study measured the EMG activities of the gluteus maximus, biceps femoris, and erector spinae, but this is insufficient to identify the interactions between the muscles around the trunk, pelvic, hip, and lower extremities. Therefore, further studies will be needed to find the long-term effects, difference between genders, and activities of more muscles.
The participants maintained 90° knee flexion with 30° hip abduction and 10° hip extension in the prone position against the resistance.
The participants performed PHEKF in 90° knee flexion with 30° hip abduction and 10° hip extension to increase the muscle activity of gluteus maximus [8].
The participants laid down in the prone position, and the PBFU was placed between the table and the participants’ lower abdomen [29]. The participants performed the ADIM in the prone position using a PBFU to control the pelvic posterior tilt [16]. The participants were then asked to draw in the abdomen and hold this position, so the change in pressure could be measured [29].
The participants received education about ADIM and exercise method using a pressure biofeedback unit (PBFU, Stabilizer, Chattanooga, USA) for ten minutes before the experiment began. The participants laid down in the prone position, and the PBFU was placed between the table and the participants’ lower abdomen [29].
Therefore, this study used PHEKE in 90° knee flexion with 30° hip abduction to strengthen the gluteus maximus selectively and inhibit hamstring activation [31].
his study suggests a method for strengthening exercise of the gluteus maximus to prevent low back pain and injury. In this study, the results showed that the activity of the gluteus maximus increased with a higher external weight load during PHEKF while the activity of the biceps femoris decreased.

대상 데이터

Sixteen healthy adult males in their 20s, who agreed voluntarily to this experiment, were included. The sample size for this study was calculated using the G* Power program 3.

데이터처리

The changes in the muscle activity of gluteus maximus, biceps femoris, and erector spinae associated with four resistance conditions during the PHEKF were determined using one-way repeated ANOVA.

이론/모형

The changes in the muscle activity of gluteus maximus, biceps femoris, and erector spinae associated with four resistance conditions during the PHEKF were determined using one-way repeated ANOVA. A Bonferroni correction was used for the post-hoc test. The significance levels were set to α = .

성능/효과

1, HeinrichHeine-University Düsseldorf, Germany). Based on the data from a pilot study, the estimated sample size required to obtain a minimum power of 80% at a significant alpha level of 95% was 14. Accordingly, 16 participants were recruited to account for a possible dropout rate of 20%.
his study suggests a method for strengthening exercise of the gluteus maximus to prevent low back pain and injury. In this study, the results showed that the activity of the gluteus maximus increased with a higher external weight load during PHEKF while the activity of the biceps femoris decreased. These findings suggest that external weight loads are needed during hip extensor exercise to strengthen the gluteus maximus and inhibit the biceps femoris.
Hence, the effects of gender were not assessed. Third, the long-term effects of external loads with PHEKF and ADIM for gluteus maximus strengthening were not examined. Fourth, there is the possibility of a measurement error of EMG.

후속연구

Finally, this study measured the EMG activities of the gluteus maximus, biceps femoris, and erector spinae, but this is insufficient to identify the interactions between the muscles around the trunk, pelvic, hip, and lower extremities. Therefore, further studies will be needed to find the long-term effects, difference between genders, and activities of more muscles.

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