THE EFFECT OF STRIDE LENGTH VARIATION ON OXYGEN-UPTAKE DURING DISTANCE RUNNING
THE EFFECT OF STRIDE LENGTH VARIATION ON OXYGEN-UPTAKE DURING DISTANCE RUNNING
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DOI：
10.1249/00005768-198201000-00006
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发表时间：
1982-01-01
影响因子：
4.1
通讯作者：
WILLIAMS, KR
中科院分区：
文献类型：
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作者：
CAVANAGH, PR;WILLIAMS, KR
10名休闲跑步者(平均。VO2 max[最大摄氧量]64.7 ml。公斤.cntdot。min-1)进行了5天的适应期，以7分钟的速度在跑步机上跑步。1英里的速度(3.83米。S-1)每天30分钟。在这些跑步中，他们自由选择的步幅被确定并表示为腿长的百分比（%LL）。在随后的2天测试中，步长在。+-的范围内系统地变化。20%左右的自由选择的值。用Douglas Bag法测定VO2。所有实验对象的步幅均为。VO2被最小化了，尽管个体剖面变化很大。平均值在。ovrhdot中增加。VO2分别为2.6和3.4 ml .cntdot。公斤.cntdot。短步长和长步长极值分别为Min-1。在不受限制的跑步过程中，偏离最佳步幅长度会导致.ovrhdot的平均增加。VO2 0.2 ml .cntdot。公斤.cntdot。最低为1。受试者在不受限制的跑步过程中使用的相对有效的跑步模式表明，他们通过训练适应了所选择的步幅长度，或者是一个成功的能量优化过程。
Ten recreational runners (mean .ovrhdot.VO2 max [maximum O2 uptake] 64.7 ml .cntdot. kg-1 .cntdot. min-1) underwent a 5 day acclimation period to treadmill running at a 7 min .cntdot. mile-1 pace (3.83 m .cntdot. s-1) for 30 min each day. During these runs their freely chosen stride lengths were determined and expressed as a percentage of leg length (%LL). On 2 subsequent testing days stride length was systematically varied over a range of .+-. 20% LL about the freely chosen value. .ovrhdot.VO2 was determined by the Douglas Bag method. All subjects exhibited a stride length at which .ovrhdot.VO2 was minimized, although the individual profiles varied considerably. The mean increases in .ovrhdot.VO2 were 2.6 and 3.4 ml .cntdot. kg-1 .cntdot. min-1 at the short- and long-stride length extremes, respectively. During unrestricted running deviations from optimal stride length caused a mean increase in .ovrhdot.VO2 of 0.2 ml .cntdot. kg-1 .cntdot. min-1. The relatively efficient running patterns used by the subjects during unrestricted running indicate an adaption to the chosen stride length through training or a successful process of energy optimization.