Temporal changes in the required shoe-floor friction when walking following an induced slip.
Temporal changes in the required shoe-floor friction when walking following an induced slip.
复制标题
DOI：
10.1371/journal.pone.0096525
复制
发表时间：
2014
期刊：
影响因子：
3.7
通讯作者：
Madigan ML
中科院分区：
文献类型：
--
作者：
Beringer DN;Nussbaum MA;Madigan ML
滑倒和福尔斯的生物力学方面已经得到了广泛的研究，以促进跌倒预防策略。先前的研究已经显示了诱导滑动事件后步态的变化。因此，大多数研究人员只让参与者滑一次，以避免这种变化，否则会降低实验结果的外部有效性。在让步态恢复到自然基线后，能够让参与者不止一次地滑倒，这将提高此类研究的实验效率。因此，本研究的目的是表征诱导滑动后行走时所需鞋-地板摩擦力的时间变化。完成了两个实验，每一个采用不同的潜在策略，以促进返回的步态自然基线后滑倒。在第一个实验中，延长远离实验室的时间被用来促进步态恢复到基线。我们测量了所需的摩擦系数在36个年轻的成年男性参与者在四个会议。前三次会议提供了基线期间的测量结果（即，自然步态）在滑动之前和滑动之后立即。第四次会议提供了一个测量1-12周后滑倒。在第二个实验中，大量的步行试验被用来促进步态恢复到基线。我们测量了10个年轻的成年男性参与者在一个单一的会议所需的摩擦系数。在10次基线行走试验期间、滑倒后即刻和50-55次额外试验期间收集测量值。在这两个实验中，所需的摩擦系数在单次滑动后立即降低12-16%，在随后的几周/步行试验中向基线水平增加，但在实验结束时与基线保持统计学差异。基于这些结果，涉及多次滑倒的参与者的实验可能不具有高水平的外部效度，并且鼓励研究人员继续将实验方案限制在每个参与者的单一诱导滑倒。
Biomechanical aspects of slips and falls have been widely studied to facilitate fall prevention strategies. Prior studies have shown changes in gait after an induced slipping event. As such, most researchers only slip participants one time to avoid such changes that would otherwise reduce the external validity of experimental results. The ability to slip participants more than once, after allowing gait to return to a natural baseline, would improve the experimental efficiency of such studies. Therefore, the goal of this study was to characterize the temporal changes in required shoe-floor friction when walking following an induced slip. Two experiments were completed, and each employed a different potential strategy to promote the return of gait to a natural baseline after slipping. In the first experiment, extended time away from the laboratory was used to promote the return of gait to baseline. We measured required coefficient-of-friction among 36 young adult male participants over four sessions. The first three sessions provided measurements during baseline (i.e., natural gait) both prior to slipping and immediately after slipping. The fourth session provided a measurement 1–12 weeks after slipping. In the second experiment, an extensive number of walking trials was used to promote the return of gait to baseline. We measured required coefficient-of-friction among 10 young adult male participants in a single session. Measurements were collected during 10 baseline walking trials, immediately after slipping, and during 50–55 additional trials. In both experiments, required coefficient-of-friction decreased 12–16% immediately after a single slip, increased toward baseline levels over subsequent weeks/walking trials, but remained statistically different from baseline at the end of the experiments. Based on these results, experiments involving slipping participants multiple times may not have a high level of external validity, and researchers are encouraged to continue to limit experimental protocols to a single induced slip per participant.
登录
查看更多内容
影响因子：
2.4
作者：
Cham, R;Redfern, MS
通讯作者：
Redfern, MS
影响因子：
2.4
作者：
Courtney, TK;Sorock, GS;Holbein-Jenny, MA
通讯作者：
Holbein-Jenny, MA
影响因子：
2.4
作者：
TISSERAND, M
通讯作者：
TISSERAND, M
影响因子：
2.4
作者：
Troy, Karen L.;Donovan, Stephanie J.;Grabiner, Mark D.
通讯作者：
Grabiner, Mark D.
影响因子：
1.8
作者：
Owings, TM;Pavol, MJ;Grabiner, MD
通讯作者：
Grabiner, MD