CAJ | 학술논문

目的通过施加不同条件下的振动刺激,探讨正常人体小腿肌肉是否存在最佳的振动激活频率以及频率范围.方法共选取健康大学生19名,分别于坐位、立位、半蹲位(屈膝30°)和卧位下接受频率为10～ 50 Hz的振动刺激,并采集振动前、振动中的的表面肌电数据.选取左腿胫骨前肌与腓肠肌内侧头作为检测肌肉,以左胫骨前肌远端为振动刺激点.分析不同条件的振动刺激激活小腿肌群的表面肌电特征.结果各种振动条件刺激均引起小腿肌肉放电量增加(P＜0.05).各体位下胫骨前肌的肌电值在不同频率时差异均有统计学意义(P＜0.05),但30 Hz、40 Hz、50 Hz间差异无统计学意义(P＞0.05)；各体位下腓肠肌的肌电值在各频率时差异均无统计学意义(P＞0.05).结论引起小腿肌肉放电量增加的峰值频率主要集中在30 ～50 Hz,可能为人体最佳的振动激活频率.
목적 통과시가불동조건하적진동자격,탐토정상인체소퇴기육시부존재최가적진동격활빈솔이급빈솔범위.방법 공선취건강대학생19명,분별우좌위、립위、반준위(굴슬30°)화와위하접수빈솔위10～ 50 Hz적진동자격,병채집진동전、진동중적적표면기전수거.선취좌퇴경골전기여비장기내측두작위검측기육,이좌경골전기원단위진동자격점.분석불동조건적진동자격격활소퇴기군적표면기전특정.결과각충진동조건자격균인기소퇴기육방전량증가(P＜0.05).각체위하경골전기적기전치재불동빈솔시차이균유통계학의의(P＜0.05),단30 Hz、40 Hz、50 Hz간차이무통계학의의(P＞0.05)；각체위하비장기적기전치재각빈솔시차이균무통계학의의(P＞0.05).결론 인기소퇴기육방전량증가적봉치빈솔주요집중재30 ～50 Hz,가능위인체최가적진동격활빈솔.
Objective To explore the best vibration frequency for activating human muscles. Methods Nineteen healthy college students accepted vibration stimulation at frequencies between 10 and 50 Hz.Surface electromyograms (sEMG) were recorded.The subjects were sitting,standing,squatting (knee flexion 30°) and recumbent.Their left anterior tibial muscles and the medial heads of the gastrocnemius were targeted as test muscles.The vibration stimulation point was on the surface of the left distal tibia.The sEMG characteristics of the calf muscles were analyzed under vibration stimulation at different frequencies. Results The leg muscles were activated significantly at all vibration frequencies,but the sEMG values of the anterior tibialis were significantly different at different frequencies,except for among 30 Hz,40 Hz and 50 Hz in any position.The gastrocnemius sEMG values were not significantly different at different frequencies. Conclusion Vibration at 30 to 50Hz may be the normal human muscle activation frequency.