고정식 자전거 운동 자세에 따른 운동부하강도와 근육 활성도 발현의 비교 = Comparsion on Exercise Load Intensity and Expression of MVIC in according to Exercise Postures during Static Cycle-Ergometer

다국어 초록 (Multilingual Abstract)

The purpose of this study was to examine the differences of exercise load intensity and muscle activity on erector spinae muscle(ES), rectus femoris muscle(RF), biceps femoris muscle(BF), gastrocnemius lateralis muscle(GL) according to three postures(front lean posture:FLP, standard posture:SP, erection posture:EP) during pedaling with static cycle-ergometer. For achieving this purpose, 8 active male students were performed.
This experiment was carried out with three times repetition. Subjects were asked to maintain three postures in bending angles from 45 to 90 degrees, performing the exercise at a same time. For measuring the exercise load(EL), we used the HR checker(Polar RS800CX, Finland) and EMG(LXM3204, Korea) in order to earn the maximum voluntary isometric contraction(MVIC) value of 4 target muscles, subjects pedaled for 60 seconds at 70 rpm on 3 sitting posture respectively. ‘TeleScan’ software program was used to analyze the values of muscle activity for earning the MVIC. These values were calculated, analyzed using oneway analysis of variance(oneway ANOVA) to detect significant differences by SPSS/PC ver. 24.00. Statistical significance was defined as p<.05. The data of three postures suggested that only RF values in accordance with three postures showed significant differences statistically(p<.05). In case of ES, its posture more contributed to RF than the other postures did during cycling. Also, this study demonstrated that no matter what postures subjects biked in, four target muscles have significant differences in muscle activity(p<.001). As this study showed RF and GL had a main role and rest of muscles supported to main muscles. Therefore, we recommend that trainers consider this result when they train people on pedaling in the Gym.

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