Scheer Volker, Vieluf Solveig, Bitter Niko, Christ Leon, Heitkamp Hans-Christian
Health Science Department, Universidad a Distancia de Madrid (UDIMA), Madrid, Spain.
Ultra Sports Science Foundation, Pierre Benite, France.
Front Physiol. 2020 Sep 30;11:571221. doi: 10.3389/fphys.2020.571221. eCollection 2020.
In endurance running, where fluid and nutritional support is not always readily available, the carriage of water and nutrition is essential. To compare the economy and physiological demands of different carriage systems, 12 recreational runners (mean age 22.8 ± 2.2 years, body mass index 24.5 ± 1.8 kg m, VOmax 50.4 ± 5.3 ml kg min), completed four running tests, each of 60-min duration at individual running speeds (mean running speed 9.5 ± 1.1 km h) on a motorized treadmill, after an initial exercise test. Either no load was carried (control) or loads of 1.0 kg, in a handheld water bottle, waist belt, or backpack. Economy was assessed by means of energy cost (CR), oxygen cost (O cost), heart rate (HR), and rate of perceived exertion (RPE). CR [(2,20) = 37.74, < 0.01, η = 0.79], O cost [(2,20) = 37.98, < 0.01, η = 0.79], HR [(2,18) = 165.62, < 0.01, η = 0.95], and RPE [(2,18) = 165.62, < 0.01, η = 0.95] increased over time, but no significant differences were found between the systems. Carrying a handheld water bottle, waist belt, or backpack, weighing 1.0 kg, during a 60-min run exhibited similar physiological changes. Runners' choice may be guided by personal preference in the absence of differences in economy (CR, O cost, HR, and RPE).
在耐力跑中，由于液体和营养支持并非总是随时可得，因此携带水和营养物质至关重要。为了比较不同携带系统的经济性和生理需求，12名休闲跑者（平均年龄22.8±2.2岁，体重指数24.5±1.8 kg/m²，最大摄氧量50.4±5.3 ml·kg⁻¹·min⁻¹）在初始运动测试后，在电动跑步机上以个人跑步速度（平均跑步速度9.5±1.1 km/h）完成了四项60分钟时长的跑步测试。要么不携带任何负荷（对照组），要么分别使用手持水壶、腰带或背包携带1.0 kg的负荷。通过能量消耗（CR）、氧气消耗（O₂消耗）、心率（HR）和主观用力程度（RPE）来评估经济性。CR [F(2,20) = 37.74, p < 0.01, η² = 0.79]、O₂消耗 [F(2,20) = 37.98, p < 0.01, η² = 0.79]、HR [F(2,18) = 165.62, p < 0.01, η² = 0.95] 和RPE [F(2,18) = 165.62, p < 0.01, η² = 0.95] 随时间增加，但各系统之间未发现显著差异。在60分钟的跑步过程中，携带1.0 kg的手持水壶、腰带或背包表现出相似的生理变化。在经济性（CR、O₂消耗、HR和RPE）无差异的情况下，跑者的选择可能受个人偏好的引导。
