건강한 성인의 리컴번트 에르고미터의 발디딤 조건에 따른 다리근육 활성도 분석 (The Analysis of lower limb muscle activity using stepping conditions on recumbent ergometer in health adults)

서지정보

· 발행기관 : 대한통합의학회
· 수록지 정보 : 대한통합의학회지 / 13권 / 1호 / 213 ~ 226페이지
· 저자명 : 황보상호, 김병조

초록

Purpose : This study aimed to analyze leg muscle activation under different stepping conditions while performing a recumbent ergometer at saddle distances to knee flexion angles of 15 °, 25 °, and 35 ° in healthy adults. Based on the findings, the study sought to provide evidence for optimal stepping conditions in recumbent ergometer to maximize selective muscle strengthening and exercise performance in clinical settings.
Methods : The study was conducted with 22 healthy adult males, adjusting the saddle distance at three knee flexion angles during recumbent ergometer. All participants performed five minutes of stretching and warm-up before the study, exercised for 30 seconds at a fraction of 60 rpm, and recorded electromyographic signals for five seconds. Surface electromyography was used to measure the activation of the rectus femoris, biceps femoris, tibialis anterior, and gastrocnemius.
Results : The muscle activation of the rectus femoris and biceps femoris showed no significant difference between knee flexion angles of 15 ° and 25 °. There was significant difference between the stepping conditions at saddle distances to knee flexion angles of 15 ° and 35 °, as well as 25 ° and 35 °. While the tibialis anterior muscle activation showed no significant differences, the gastrocnemius muscle activation exhibited significant differences across all stepping conditions, including knee flexion angles of 15 ° and 25 °, 15 ° and 35 °, and 25 ° and 35 °.
Conclusion : During recumbent ergometer, in the stepping condition to knee flexion of 15 °, where the saddle distance was longer, the muscle activation of the biceps femoris and gastrocnemius significantly increased. In contrast, in the stepping condition to knee flexion of 35 °, where the saddle distance was shorter, the activation of the rectus femoris significantly increased. Future recumbent ergometer should be performed with stepping conditions set according to knee flexion angles that align with an individual's anthropometric characteristics and exercise goals.

영어초록

Purpose : This study sought to find out the effect of stepping conditions on leg muscle activity during recumbent ergometer exercise.
Methods : Twenty-two healthy adult males participated in the study and adjusted the length of recumbent ergometer saddle to measure the activity of leg muscles in three stepping angle (15°, 25°, 35°). All participants in the study conducted five minutes of stretching and warming up, performed for 30 seconds with a fraction of 60 rpm, and recorded 5 seconds of electromyogram. Surface electromyogram was used to measure the activity of the rectus femoris, biceps femoris, tibialis anterior, and gastrocnemius.
Results : In this study, the increased knee angle than 25°, known as the optimum knee angle, the higher the activity of the rectus femoris, and the lower the knee flexion angle than 25°, the greater the activity of biceps femoris and gastrocnemius.
Conclusion : Therefore, in order to strengthen the knee joint extensor when using recumbent ergometer, it is necessary to set the knee angle greater than 25°, the knee joint flexor less than 35°, and the knee angle less than 25° to strengthen the plantar flexor of the ankle joint.

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