PDF(Pubmed)
Abstract：
Arm-cycling is a versatile exercise modality with applications in both athletic enhancement and rehabilitation, yet the influence of forearm orientation remains understudied. Thus, this study aimed to investigate the impact of forearm position on upper-body arm-cycling Wingate tests. Fourteen adult males (27.3 ± 5.8 years) underwent bilateral assessments of handgrip strength in standing and seated positions, followed by pronated and supinated forward arm-cycling Wingate tests. Electromyography (EMG) was recorded from five upper-extremity muscles, including anterior deltoid, triceps brachii lateral head, biceps brachii, latissimus dorsi, and brachioradialis. Simultaneously, bilateral normal and propulsion forces were measured at the pedal-crank interface. Rate of perceived exertion (RPE), power output, and fatigue index were recorded post-test. The results showed that a pronated forearm position provided significantly (p < 0.05) higher normal and propulsion forces and triceps brachii muscle activation patterns during arm-cycling. No significant difference in RPE was observed between forearm positions (p = 0.17). A positive correlation was found between seated handgrip strength and peak power output during the Wingate test while pronated (dominant: p = 0.01, r = 0.55; non-dominant: p = 0.03, r = 0.49) and supinated (dominant: p = 0.03, r = 0.51; don-dominant: p = 0.04, r = 0.47). Fatigue changed the force and EMG profile during the Wingate test. In conclusion, this study enhances our understanding of forearm position\'s impact on upper-body Wingate tests. These findings have implications for optimizing training and performance strategies in individuals using arm-cycling for athletic enhancement and rehabilitation.
摘要：
手臂自行车是一种多功能的锻炼方式，在运动增强和康复中都有应用，然而，前臂取向的影响仍未得到充分研究。因此，本研究旨在探讨前臂位置对上身臂循环Wingate试验的影响。14名成年男性（27.3±5.8岁）在站立和坐姿下进行了双侧握力评估，然后进行前旋和仰卧前臂循环Wingate试验。肌电图（EMG）记录从五个上肢肌肉，包括前三角肌,肱三头肌外侧头，肱二头肌,背阔肌,和肱背肌.同时,在踏板-曲柄接口处测量双侧法向力和推进力。感知劳累率(RPE)，功率输出,测试后记录疲劳指数。结果表明，前臂的内旋位置在手臂循环过程中提供了显着（p<0.05）更高的正常力和推进力以及肱三头肌激活模式。在前臂位置之间没有观察到RPE的显着差异（p=0.17）。在旋前（占优势：p=0.01，r=0.55；非占优势：p=0.03，r=0.49）和旋上（占优势：p=0.03，r=0.51；不占优势：p=0.04，r=0.47）的Wingate测试中，坐姿握力与峰值功率输出之间存在正相关。在Wingate测试期间，疲劳改变了力和EMG轮廓。总之,这项研究增强了我们对前臂位置对上身Wingate测试的影响的理解。这些发现对于优化使用手臂自行车进行运动增强和康复的个体的训练和表现策略具有重要意义。
