PDF(Pubmed)
Abstract：
Sprinting plays a significant role in determining the results of road cycling races worldwide. However, currently, there is a lack of systematic research into the kinematics of sprint cycling, especially in an outdoor, environmentally valid setting. This study aimed to describe selected joint kinematics during a cycling sprint outdoors. Three participants were recorded sprinting over 60 meters in both standing and seated sprinting positions on an outdoor course with a baseline condition of seated cycling at 20 km/h. The participants were recorded using array-based inertial measurement units to collect joint excursions of the upper and lower limbs including the trunk. A high-rate GPS unit was used to record velocity during each recorded condition. Kinematic data were analyzed in a similar fashion to running gait, where multiple pedal strokes were identified, delineated, and averaged to form a representative (average ± SD) waveform. Participants maintained stable kinematics in most joints studied during the baseline condition, but variations in ranges of movement were recorded during seated and standing sprinting. Discernable patterns started to emerge for several kinematic profiles during standing sprinting. Alternate sprinting strategies emerged between participants and bilateral asymmetries were also recorded in the individuals tested. This approach to studying road cycling holds substantial potential for researchers wishing to explore this sport.
摘要：
短跑在确定全球公路自行车比赛的结果方面发挥着重要作用。然而,目前,缺乏对短跑自行车运动学的系统研究，尤其是在户外,环境有效设置。这项研究旨在描述户外自行车短跑过程中选定的关节运动学。记录了三名参与者在户外赛道上站立和坐姿冲刺超过60米的冲刺，其基准条件是以20km/h的速度坐骑自行车。使用基于阵列的惯性测量单元记录参与者，以收集包括躯干在内的上肢和下肢的关节运动。在每个记录的条件下，使用高速率GPS单元记录速度。以类似于跑步步态的方式分析运动学数据，确定了多个踏板行程，划定，并取平均值以形成代表性(平均值±SD)波形。参与者在基线条件下研究的大多数关节都保持稳定的运动学，但是在坐姿和站立短跑过程中记录了运动范围的变化。站立冲刺期间，几种运动学轮廓开始出现可识别的模式。参与者之间出现了替代的冲刺策略，并且在被测试的个体中也记录了双边不对称。这种研究公路自行车的方法对于希望探索这项运动的研究人员来说具有巨大的潜力。
