Haelewijn Nicolas, Staes Filip, Vereecke Evie, Rosseel Stijn, Deschamps Kevin
Department of Rehabilitation Sciences, Musculoskeletal Rehabilitation Research Group, KU Leuven, Brugge, Belgium.
Department of Rehabilitation Sciences, Musculoskeletal Rehabilitation Research Group, KU Leuven, Leuven, Belgium.
J Foot Ankle Res. 2025 Sep;18(3):e70078. doi: 10.1002/jfa2.70078.
Understanding foot joint loading during different dynamic activities is essential information for guiding exercise progression in rehabilitation. While walking and running biomechanics are well studied, joint-specific kinetic data during a single leg drop and hop task, often used in rehabilitation, are lacking. This study aimed to evaluate (1) the kinetic behavior of the ankle, Chopart, Lisfranc, and MTP-1 joints during a drop-hop task under different visual constraints and (2) to contextualize these findings by comparing them with heel-strike running, to assess the relative loading demands of the drop-hop task.
Seventeen recreationally active male adults performed a single-leg drop and hop under two visual focus conditions: central (focusing on the landing spot) and peripheral (focusing straight ahead). Kinematics, moments, and power were analyzed using a four-segment foot model with statistical parametric mapping. Additionally, peak plantarflexion moments and power outputs were compared with existing data from heel-strike running data from a mixed-sex sample (4 males, 3 females) collected in a separate study using the same setup.
Findings revealed no differences between central and peripheral focus conditions. Heel-strike running shows similar joint loading, but higher power generation (p < 0.001) at the ankle and Chopart joint, higher absorption (p < 0.001) at the Chopart and MTP-1 (p < 0.05) joint and lower power absorption (p < 0.001) at the ankle and Lisfranc joint.
Visual input does not influence foot biomechanics during a single-leg drop and hop. This task produces similar joint loading patterns similar to heel-strike running but with reduced power generation at the ankle and midfoot. Contrary to global belief, the single leg drop-hop task is not excessively more demanding in terms of foot joint loading, supporting the earlier use of drop-hop exercises in rehabilitation programs. They offer a controlled way to reintroduce loading while avoiding the full propulsion demands of running, independent of visual focus.
了解不同动态活动期间足部关节的负荷情况，对于指导康复训练中的运动进展至关重要。虽然步行和跑步的生物力学已得到充分研究，但在康复训练中常用的单腿下落和跳跃任务期间，特定关节的动力学数据却很缺乏。本研究旨在评估：（1）在不同视觉限制条件下的下落-跳跃任务期间，踝关节、Chopart关节、Lisfranc关节和第一跖趾关节（MTP-1）的动力学行为；（2）通过将这些结果与足跟触地跑步进行比较，来将这些发现置于情境中，以评估下落-跳跃任务的相对负荷需求。
17名有休闲运动习惯的成年男性在两种视觉焦点条件下进行单腿下落和跳跃：中央焦点（专注于着陆点）和周边焦点（直视前方）。使用具有统计参数映射的四段足部模型分析运动学、力矩和功率。此外，将峰值跖屈力矩和功率输出与在另一项研究中使用相同设置收集的混合性别样本（4名男性，3名女性）的足跟触地跑步数据中的现有数据进行比较。
研究结果显示中央焦点和周边焦点条件之间没有差异。足跟触地跑步显示出类似的关节负荷，但踝关节和Chopart关节的功率生成更高（p < 0.001），Chopart关节和MTP-1关节（p < 0.05）的吸收更高，踝关节和Lisfranc关节的功率吸收更低（p < 0.001）。
视觉输入在单腿下落和跳跃过程中不会影响足部生物力学。该任务产生的关节负荷模式与足跟触地跑步类似，但踝关节和中足的功率生成减少。与普遍看法相反，单腿下落-跳跃任务在足部关节负荷方面的要求并非过高，这支持了在康复计划中更早使用下落-跳跃练习。它们提供了一种可控的方式来重新引入负荷，同时避免跑步的全部推进需求，且与视觉焦点无关。
