Medbase St. Gallen Am Vadianplatz, 9000 St. Gallen, Switzerland.
Institute of Primary Care, University of Zurich, 8006 Zurich, Switzerland.
Int J Environ Res Public Health. 2019 Aug 16;16(16):2943. doi: 10.3390/ijerph16162943.
The present case study analyzed the pacing in a self-paced world record attempt during a 24 h track cycling event by the current world record holder. The cyclist completed 3767 laps on a 250 m long cycling track and covered a total distance of 941.873 km, breaking the existing world record by 37.99 km. The average cycling speed was 39.2 ± 1.9 km/h (range 35.5-42.8 km/h) and the power output measured was 214.5 ± 23.7 W (range 190.0-266.0 W) during the 24 h of cycling. We found a positive pacing result with negative correlations between cycling speed ( = -0.73, < 0.001), power output ( = -0.66, < 0.001), and laps per hour ( = -0.73, < 0.001) and the covered distance. During the 24 h, we could identify four different phases: the first phase lasting from the start till the fourth hour with a relatively stable speed; the second phase from the fourth till the ninth hour, characterized by the largest decrease in cycling speed; the third phase from the ninth hour till the 22nd hour, showing relatively small changes in cycling speed; and the last phase from the 22nd hour till the end, presenting a final end spurt. The performance in the 24 h track cycling was 45.577 km better than in the 24 h road cycling, where the same athlete cycled slower but with higher power output. In summary, the current world-best ultracyclist covered more kilometers with less power output during the world record 24 h track cycling than during his world record 24 h road cycling. This was most probably due to the more favorable environmental conditions in the velodrome, which has no wind and stable temperatures.
本案例研究分析了当前世界纪录保持者在 24 小时自行车赛道比赛中自我计时世界纪录尝试的节奏。自行车手在 250 米长的自行车赛道上完成了 3767 圈，总行程为 941.873 公里，打破了现有的世界纪录 37.99 公里。平均骑行速度为 39.2 ± 1.9 公里/小时（范围 35.5-42.8 公里/小时），在 24 小时的骑行过程中，测量到的功率输出为 214.5 ± 23.7 W（范围 190.0-266.0 W）。我们发现了一个积极的节奏结果，骑行速度（ = -0.73， < 0.001）、功率输出（ = -0.66， < 0.001）和每小时圈数（ = -0.73， < 0.001）与覆盖距离之间呈负相关。在 24 小时内，我们可以识别出四个不同的阶段：第一个阶段从开始持续到第四个小时，速度相对稳定；第二个阶段从第四个小时到第九个小时，以骑行速度最大下降为特征；第三个阶段从第九个小时到第 22 个小时，骑行速度变化相对较小；最后一个阶段从第 22 个小时到结束，呈现出最后的冲刺。在 24 小时自行车赛道比赛中的表现比在 24 小时公路自行车比赛中要好 45.577 公里，在公路自行车比赛中，同一运动员骑行速度较慢，但功率输出较高。总的来说，当前世界最佳超长距离自行车运动员在 24 小时自行车赛道世界纪录尝试中比在 24 小时公路世界纪录尝试中覆盖了更多的公里数，同时使用的功率输出更少。这很可能是由于室内自行车馆的环境条件更为有利，没有风和稳定的温度。
