선택한 단어 수는 입니다.
최소 단어 이상 선택하여야 합니다.
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선택한 단어 수는 30입니다.
최대 10 단어까지만 선택 가능합니다.
최대 10 단어까지만 선택 가능합니다.
제안 방법
- For each trial, the average and peak normalized EMG levels of each muscle over three different pedal shaft widths were determined. A one-way analysis of variance with repeated measured was conducted to determined whether there were significant differences among three different pedal shaft widths.
- A thorough understanding of the muscle activity process could very well 1 ead to improvements in efficiency. In this study, EMG activities during cycling were investigated under conditions of different pedal shaft widths. It is clear that the lower limb muscle stresses may be determined with good accuracy directly from EMG activity.
- Because tire pressure affects rolling friction and thus the work needed to turn the pedals, the tires were kept at a constant pressure of 80 PSIG during the experiment Prior to testing, the bicycle was aligned according to 100% of trochanteric leg length of each subject. The subject then rode a conventional racing bicycle with toe-clips mounted on the Wind Trainer (system of Schwinn II magnetic roller) at three different pedal shaft widths (normal, two inches, and four inches). Three different pedal shaft widths were randomly ordered and tested to prevent a treatment effect.
- There was an informational meeting for the subjects prior to the study. The subjects were then informed of the study's procedures and learned to perform the required exercises. Test protocol required each rider to pedal at a pedalling frequency of 80 rev/min.
- This program were used to filter and rectify the raw EMG signals. To obtain maximum EMG levels of the selected muscles for normalization, three maximum effort isometric contractions were performed before the experimental trials.
대상 데이터
- Five female subjects were asked to participate in this study. All of the subjects were experienced recreational cyclists. Each subject was familiarized with the experimental protocol and signed an informed consent statement, as required by the University Guidelines for the Protection of Human Subjects.
- Five female subjects were asked to participate in this study. All of the subjects were experienced recreational cyclists.
- Two S-VHS video cameras (Panasonic Digital 5(XX)) were used to record cycling movements of each subject The cameras were positioned ten meters from the subjects and were placed 쥲t a 90 degrees angle to each other. To synchronize the EMG and video, a synchronization unit was activated during the time the EMG was sampled.
이론/모형
- A one-way analysis of variance with repeated measured was conducted to determined whether there were significant differences among three different pedal shaft widths. When a significant difference was found, post hoc analyses were performed using the Newman Keuls post hoc analysis. A confidence level of g<.
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