Santalla Alfredo, Manzano José Manuel, Pérez Margarita, Lucía Alejandro
Universidad Alfonso X El Sabio, Madrid, Spain.
Med Sci Sports Exerc. 2002 Nov;34(11):1854-8. doi: 10.1097/00005768-200211000-00024.
To assess the effects of the Rotor (ROT), a new pedaling system that makes each pedal independent from the other so that cranks are no longer fixed at 180 degrees, on endurance cycling performance.
Following a randomized design, eight subjects (noncyclists; age (mean +/- SEM): 22 +/- 1 yr; VO(2max): 51.8 +/- 1.0 mL x kg(-1) x min(-1)) performed two bicycle-ergometer tests on separate days, one with the conventional pedaling system (CON) and the other one with ROT. Starting at 75 W, the power output was increased by 25 W at 3-min intervals until volitional exhaustion. Gas exchange parameters and blood lactate were measured for every 3-min interval.
At exercise intensities between 60 and 90% VO(2max), delta efficiency (DE) was significantly higher in ROT than in CON (24.4 +/- 1.9% vs 21.1 +/- 1.1%, respectively).
Although more research is needed, especially with trained riders, the Rotor system might improve delta efficiency during endurance cycling. Other performance determinants VO(2max), maximal power output) do not seem to be changed compared with the conventional system.
评估一种新型踏板系统Rotor（ROT）对耐力骑行表现的影响，该系统使每个踏板相互独立，从而曲柄不再固定在180度。
采用随机设计，8名受试者（非骑行者；年龄（均值±标准误）：22±1岁；最大摄氧量：51.8±1.0 mL·kg⁻¹·min⁻¹）在不同日期进行两次自行车测力计测试，一次使用传统踏板系统（CON），另一次使用ROT。从75瓦开始，功率输出以3分钟的间隔增加25瓦，直至自愿疲劳。每隔3分钟测量气体交换参数和血乳酸。
在运动强度为最大摄氧量的60%至90%之间时，ROT的效率增量（DE）显著高于CON（分别为24.4±1.9%和21.1±1.
