This study compared stride length, stride frequency, contact time, flight time and foot-strike patterns (FSP) when running barefoot, and in minimalist and conventional running shoes. Habitually shod male athletes (n = 14; age 25 ± 6 yr; competitive running experience 8 ± 3 yr) completed a randomised order of 6 by 4-min treadmill runs at velocities (V1 and V2) equivalent to 70 and 85% of best 5-km race time, in the three conditions. Synchronous recording of 3-D joint kinematics and ground reaction force data examined spatiotemporal variables and FSP. Most participants adopted a mid-foot strike pattern, regardless of condition. Heel-toe latency was less at V2 than V1 (-6 ± 20 vs. -1 ± 13 ms, p < 0.05), which indicated a velocity related shift towards a more FFS pattern. Stride duration and flight time, when shod and in minimalist footwear, were greater than barefoot (713 ± 48 and 701 ± 49 vs. 679 ± 56 ms, p < 0.001; and 502 ± 45 and 503 ± 41 vs. 488 ±4 9 ms, p < 0.05, respectively). Contact time was significantly longer when running shod than barefoot or in minimalist footwear (211±30 vs. 191 ± 29 ms and 198 ± 33 ms, p < 0.001). When running barefoot, stride frequency was significantly higher (p < 0.001) than in conventional and minimalist footwear (89 ± 7 vs. 85 ± 6 and 86 ± 6 strides·min-1). In conclusion, differences in spatiotemporal variables occurred within a single running session, irrespective of barefoot running experience, and, without a detectable change in FSP.Key points class="unordered" style="list-style-type:disc">Differences in spatiotemporal variables occurred within a single running session, without a change in foot strike pattern.Stride duration and flight time were greater when shod and in minimalist footwear than when barefoot.Stride frequency when barefoot was higher than when shod or in minimalist footwear.Contact time when shod was longer than when barefoot or in minimalist footwear.Spatiotemporal variables when running in minimalist footwear more closely resemble shod than barefoot running.
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机译：这项研究比较了赤脚跑步，极简跑鞋和传统跑鞋的步幅，步幅，接触时间，飞行时间和踩脚模式（FSP）。习惯穿运动服的男性运动员（n = 14；年龄25±6岁；竞技跑步经验8±3岁）以4分钟的跑步机速度（V1和V2）完成了随机的6阶跑步，跑步速度分别为最佳速度的70％和85％在三种情况下，比赛时间为5公里。 3-D关节运动学和地面反作用力数据的同步记录检查了时空变量和FSP。不论情况如何，大多数参与者都采用了中足打击模式。在V2处，脚跟脚趾的潜伏期短于V1（-6±20 vs. -1±13 ms，p <0.05），这表明速度相关的向FFS模式的转变。穿着短靴和极简鞋时的步幅持续时间和飞行时间大于赤脚（713±48和701±49 vs. 679±56 ms，p <0.001；以及502±45和503±41 vs. 488±4 9 ms，p分别为0.05）。跑步时，接触时间比赤脚或穿着极简鞋要长得多（211±30对191±29 ms和198±33 ms，p <0.001）。赤脚跑步时的步幅明显高于传统和极简主义鞋（p <0.001）（89±7 vs. 85±6和86±6步幅·min -1 ）。总之，时空变量的差异发生在单个跑步会话中，而与赤脚跑步经验无关，并且FSP没有可检测的变化。要点 class =“ unordered” style =“ list-style-type：disc”> <！-list-behavior = unordered prefix-word = mark-type = disc max-label-size = 0-> 时空变量的差异发生在单个运行会话中，而步行方式没有变化。 穿鞋和穿着极简鞋时的步幅持续时间和飞行时间要比赤脚时长。 赤脚高于穿鞋或极简鞋时的步幅频率。 < li>靴子的接触时间比赤脚或极简鞋的接触时间长。 在极简鞋中跑步时空变量比赤脚跑步时更紧密。
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