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- W2053867919 abstract "Gradual increase maximum loading test (GMT) and six seconds all-out test (SAT) both have demonstrated good reliability and reproducibility for measure knee extensor electromyography (EMG) maximum value during cycling. However, the differences between the two methods are still unclear. PURPOSE: The purpose of the study was to compare the two dynamic normalization methods during cyclling. METHODS: Ten healthy male subjects (age=24.2 + 4.1 yrs) who had no known musculoskeletal or neurological diseases participated in this study. AcqKnowledge Biopac system was used to collect the EMG activities of vastus medialis oblique (VMO) and vastus lateralis (VL) while each subject performed the two cycling normalization tests on the ergometer (Monark, ergomedic 828E, Stockholm, Sweden). Subject performed a standardized 5-minute warm-up (1kp and 85 rpm) first and then resistance was gradually increased until the subject's maximum tolerable resistance was determined (GMT process). The maximum tolerable resistance was defined as the highest resistance level where the subject could still maintain 85 rpm cycling. After 10 min rest, the subject kept the 85 rpm pedaling velocity at the low loading (1.5∼2.5 kp) and then started to pedal as forcefully as possible for six seconds (SAT process) when a start signal was given to him. During the test, verbal encouragement was given to each subject. Matlab 2007 (Mathworks, USA) was used for data analysis to filter and then calculate root mean square from the two raw muscle EMG activities of each trial. SPSS for windows (version 12.0) was used to compare the levels of activity between GMT and SAT by pair T-test. Beside this, the coefficient of variation (CV) was presented, too. The significance level was set at p < 0.05. RESULTS: GMT had significantly higher activities than SAT in both of VL (59.3+33.6 vs. 41.0+30.5mV, p= 0.048) and VM (130.7+61.6 vs. 91.9+42.3mV, p= 0.027). The CV of GMT and SAT were similar (47.1, 46.0%). CONCLUSION: GMT showed higher muscle EMG activities in VMO and VL than SAT using the dynamic normalization methods during cycling." @default.
- W2053867919 created "2016-06-24" @default.
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- W2053867919 date "2010-05-01" @default.
- W2053867919 modified "2023-09-26" @default.
- W2053867919 title "Comparison of Knee Extensor EMG Activities During Cycling Using Two Dynamic Normalization Methods" @default.
- W2053867919 doi "https://doi.org/10.1249/01.mss.0000385912.41965.b4" @default.
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