Cues to land softly and quietly result in acute reductions in ground reaction force loading rates in runners.
Cues to land softly and quietly result in acute reductions in ground reaction force loading rates in runners.
复制标题
轻柔、安静地着陆的提示会导致跑步者地面反作用力负载率急剧降低。
DOI：
10.1016/j.gaitpost.2024.02.008
复制
发表时间：
2024
期刊：
影响因子：
2.4
通讯作者：
Johnson,CalebD
中科院分区：
文献类型：
--
作者：
Sara,LaurenK;Gaudette,LoganW;SouzaJúnior,JoséRobertode;Tenforde,AdamS;Wasserman,Lindsay;Johnson,CalebD
跑步者常见的一个步态再训练目标是降低与损伤相关的垂直地面反作用力（GRF）加载率（LRs）。许多步态再训练计划优先考虑内部注意焦点，尽管有证据支持在期望特定结果时（例如，LR减少）需要外部注意焦点。研究问题：外部注意力集中（使用安静、软着陆的提示）与使用普通内部注意力集中（赤脚前脚掌击球）所达到的LRs减少是否相当？方法本观察性研究纳入了37名受伤的跑步者（18名男性，平均年龄36（14）岁）。跑步者在胫骨内侧远端佩戴惯性测量装置，在装有仪器的跑步机上以自己选择的速度跑步。收集三种情况下的数据：1)shoe - control（穿鞋，无提示）；2)鞋-安静（穿鞋，提示安静，软着陆）；3)赤脚着地（赤脚，前脚着地（FFS）的提示）。在不同条件下比较受试者内变量：垂直瞬时加载率（LR，主要结局）；初始加载时的竖向刚度；峰值垂直GRF；胫骨垂直加速度峰值；和节奏。结果与shod - control组相比，Shod-Quiet组的垂直LR、刚度和TA较低（p <0.001）。鞋-安静和鞋-控制两组的峰值垂直GRF和节奏无显著差异。静鞋和赤脚ffs的刚度和LR降低相似，赤脚ffs的GRF在两种鞋况下保持相似。然而，跑步者表现出额外的TA减少和节奏增加，当从鞋-安静过渡到赤脚ffs条件（p <0.05）。这些结果表明，对安静软着陆的关注可能是未来研究中有效的步态再训练方法。
BackgroundA common gait retraining goal for runners is reducing vertical ground reaction force (GRF) loading rates (LRs), which have been associated with injury. Many gait retraining programs prioritize an internal focus of attention, despite evidence supporting an external focus of attention when a specific outcome is desired (e.g., LR reduction).Research QuestionDoes an external focus of attention (using cues for quiet, soft landings) result in comparable reductions in LRs to those achieved using a common internal focus (forefoot striking while barefoot)?MethodsThis observational study included 37 injured runners (18 male; mean age 36 (14) years) at the OMITTED Running Center. Runners wore inertial measurement units over the distal-medial tibia while running on an instrumented treadmill at a self-selected speed. Data were collected for three conditions: 1) Shod-Control (wearing shoes, without cues); 2) Shod-Quiet (wearing shoes, cues for quiet, soft landings); and 3) Barefoot-FFS (barefoot, cues for forefoot strike (FFS)). Within-subject variables were compared across conditions: vertical instantaneous loading rate (LR, primary outcome); vertical stiffness during initial loading; peak vertical GRF; peak vertical tibial acceleration (TA); and cadence.ResultsVertical LR, stiffness, and TA were lower in the Shod-Quiet compared to Shod-Controlp <0.001). Peak vertical GRF and cadence were not different between Shod-Quiet and Shod-Control. Reductions in stiffness and LR were similar between Shod-Quiet and Barefoot-FFS, and GRF in Barefoot-FFS remained similar to both shod conditions. However, runners demonstrated additional reductions in TA and increased cadence when transitioning from Shod-Quiet to the Barefoot-FFS condition (p <0.05).SignificanceThese results suggests that a focus on quiet, soft landings may be an effective gait retraining method for future research.