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引用次数: 9
摘要
本研究探讨了在长时间行走中,穿旧的鞋子对小腿稳定性、减震和能量消耗的影响。七名男性受试者(23.4 +/- 0.5岁)穿着三双不同的鞋子以4.8公里/小时的速度步行60分钟:其中两双鞋底严重磨损和中度磨损(分别为EASC:鞋子过度磨损和MASC:鞋子中度磨损),另一双没有磨损(NASC:鞋子无磨损)。在60分钟的步行过程中,测量了脚跟撞击时距下的冲击加速度、站立阶段的后脚角度(距下关节和小腿)以及摄氧量(VO2)。在步行第10分钟时,穿旧的鞋子会增加距下关节的旋后和下肢的压迫。此外,EASC的VO2 (808.3 ml x min(-1))明显大于NASC (749.5 ml x min(-1))。然而,在60分钟的步行过程中,鞋子状况对后脚角度和VO2没有时间影响。相比之下,EASC的距下关节处的冲击加速度在步行30分钟之前几乎保持不变,然后开始升高。总之,穿坏的鞋子增加了步行时的能量消耗,降低了下肢的稳定性,尽管这些变化不受60分钟内步行时间的影响。然而,长时间的步行显示出磨损的鞋子对减震的潜在负面影响。
Effects of worn-out soles on lower limb stability, shock absorption and energy cost during prolonged walking.
This study investigated the effects of worn-out shoes on lower leg stability, shock absorption and energy cost during prolonged walking. Seven male subjects (23.4 +/- 0.5 yr) walked at 4.8 km/h for 60 minutes wearing three different pairs of shoes: two of these pairs had severely and moderately worn soles (EASC: Excessive Attrite Shoe Condition and MASC: Moderate Attrite Shoe Condition, respectively) and the other pair had no wear (NASC: No Attrite Shoe Condition). Impact acceleration at the subtalar at heel strike, rearfoot angles (the subtalar joint and the lower leg) during stance phase, and oxygen uptake (VO2) were measured throughout the 60-minute walk. At the 10th minute of walking, worn-out shoes increased the supination of the subtalar joint and extortion of the lower leg. In addition, VO2 was significant larger in EASC (808.3 ml x min(-1)) than in NASC (749.5 ml x min(-1)). During the 60-minute walk, however, there were no time effects of shoe condition on the rearfoot angles and on VO2. In contrast, impact acceleration at the subtalar joint in EASC remained almost constant until the 30th minute of walking, and then began to elevate. In conclusion, worn-out shoes increased the energy cost and reduced lower leg stability during walking, although these changes were not influenced by walking duration within 60 minutes. However, prolonged walking showed the potential negative effect of worn-out shoe on shock absorption.
期刊介绍:
Journal of Physiological Anthropology (JPA) is an open access, peer-reviewed journal that publishes research on the physiological functions of modern mankind, with an emphasis on the physical and bio-cultural effects on human adaptability to the current environment.
The objective of JPA is to evaluate physiological adaptations to modern living environments, and to publish research from different scientific fields concerned with environmental impact on human life.
Topic areas include, but are not limited to:
environmental physiology
bio-cultural environment
living environment
epigenetic adaptation
development and growth
age and sex differences
nutrition and morphology
physical fitness and health
Journal of Physiological Anthropology is the official journal of the Japan Society of Physiological Anthropology.