身体姿势会影响未经训练的自行车骑行者的表现。
Body position affects performance in untrained cyclists.
作者信息
Ashe M C, Scroop G C, Frisken P I, Amery C A, Wilkins M A, Khan K M
机构信息
University of British Columbia, Vancouver, BC, Canada.
出版信息
Br J Sports Med. 2003;37(5):441-4. doi: 10.1136/bjsm.37.5.441.
OBJECTIVE
To compare cardiovascular and ventilatory variables in upright versus aero cycle ergometry at submaximal and maximal exercise intensities in untrained cyclists.
METHOD
Ten physically active men (mean (SD) age 19.1 (1.10) years) who were unfamiliar with aerobars underwent maximal exercise testing and steady state cycling at 50, 100, and 150 W.
RESULTS
Participants had significantly greater maxima for oxygen uptake (VO2), ventilation, heart rate, and workload maximum in the upright position. During steady state cycling at the three workloads, VO2 (ml/kg/min) and gross mechanical efficiency were significantly greater in the upright position.
CONCLUSIONS
In untrained subjects performing with maximal effort, the upright position permits greater VO2, ventilation, heart rate, and workload maxima. Further, in the steady state, exercise cycling may be less costly in the upright position. For this reason, untrained cyclists need to weigh body position effects against the well known aerodynamic advantages of the aero position.
目的
比较未经训练的自行车骑行者在次最大和最大运动强度下，直立骑行与空气动力学自行车测功计骑行时的心血管和通气变量。
方法
十名身体活跃的男性（平均（标准差）年龄19.1（1.10）岁），他们不熟悉空气动力学车把，进行了最大运动测试以及在50瓦、100瓦和150瓦功率下的稳态骑行。
结果
参与者在直立姿势下的最大摄氧量（VO₂）、通气量、心率和最大工作量显著更高。在三种工作负荷的稳态骑行过程中，直立姿势下的VO₂（毫升/千克/分钟）和总机械效率显著更高。
结论
在竭尽全力运动的未经训练的受试者中，直立姿势可实现更高的VO₂、通气量、心率和最大工作量。此外，在稳态下，直立姿势的骑行运动成本可能更低。因此，未经训练的自行车骑行者需要权衡身体姿势的影响与空气动力学姿势众所周知的优势。
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