本研究目的在於比較不同坡度及不同把手在騎乘自行車時，上肢肌群肌肉活化情形是否有差異，藉由Noraxon表面肌電儀以1500Hz頻率擷取八位參與者騎乘30秒的肌電訊號，再經由SPSS12.0統計軟體，以重複量數二因子變異數分析進行比較，若達顯著再以LSD進行事後比較，統計水準設定為α＝.05。研究結果顯示：一、上坡對伸腕肌平均肌電有顯著差異(p<0.5)；二、上坡對屈腕肌平均肌電有顯著差異(p<0.5)；三、平直型把手對屈腕肌平均肌電有顯著差異(p<0.5)；四、上坡對肱二頭肌平均肌電有顯著差異(p<0.5)；五、下彎型把手對肱三頭肌平均肌電有顯著差異(p<0.5)；六、坡度與把手在三角肌有交互作用存在(p<0.5)；七、上坡與平地對闊背肌平均肌電有顯著差異(p<0.5)；八、下彎型把手、平直型把手、上昇型把手對闊背肌平均肌電有顯著差異(p<0.5)；九、坡度的研究以上坡的平均肌肉活化情形最高，其次是平地，最後為下坡。

The main purpose of this study is to compare and discuss the muscle activation difference in upper limb muscles when riding bikes in different slope, and when using different handlebar. In this study, we use Noraxon with the frequency in 1500Hz to collect eight participants’ electromyography signals when riding for 30secs. Then we use two-way ANOVA with repeated measures (α＝.05) to analyze and compare data by the statistics software SPSS12.0 . If the difference is obvious, we use LSD for consequence comparison.
The result of the this study are as follows: 1. There is obvious difference in Extensor Carpi Ulnaris average electromyography when in the up-rise slope(p<0.5). 2. There is obvious difference in Flexor Carpi Ulnaris average electromyography when in the up-rise slope (p<0.5). 3. There is obvious difference in Flexor Carpi Ulnaris average electromyography when with the straight handlebar (p<0.5). 4. There is obvious difference in Bicipital muscles of arm average electromyography when in the 4°up-rise slope (p<0.5). 5. There is obvious difference in Triceps average electromyography when with the downward handlebar (p<0.5). 6. There is mutual affect existing between degree of slope and handlebar in Deltoid. (p<0.5). 7. There’s obvious difference in Latissimus Dorsi average electromyography when in the up-rise slope and in the flat (p<0.5). 8. There is obvious difference in Latissimus Dorsi average electromyography with handlebar, such types as downward, straight and upward. (p<0.5). 9.The average muscle activation in the slope study ranks from high to low is up-rise, flat, and then descent.

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