Department of Athletic Performance, National Taiwan Normal University, Taipei, Taiwan.
Graduate Institute of Sports Equipment Technology, Taipei Physical Education College, Taipei, Taiwan.
Sports Biomech. 2013 Nov;12(4):334-42. doi: 10.1080/14763141.2013.841983.
In addition to vertical ground reaction force (GRF), anterior-posterior GRF with a greater external moment arm may be another repetitive impact force that contributes to overuse running injuries. In this study, a shear cushion device was placed between the sole of a shoe and the ground to reduce not only the vertical loading, but also the anterior-posterior loading while walking and running. For this study, 15 healthy male runners classified as heel strikers (height: 173.2 +/- 4.7 cm, mass: 68.5 +/- 5.6 kg) were recruited. Participants were required to walk (2.5 m/s), jog (3.5 m/s), and run (4.2 m/s) while wearing shoes with three different sole groove designs (conventional, straight groove, and 45 degrees groove). Both the straight and 45 degrees groove soles provided significant shear shift during walking, jogging, and running, as well as delayed the time to first peak anterior-posterior GRF during walking. The straight groove sole reduced the vertical loading rate during jogging (p = 0.010) and running (p = 0.010), and delayed the time to first peak vertical GRF in all gait conditions. These findings suggest that the vertical loading rate and the time to the first peak anterior-posterior GRF can be changed by the sole groove design under various gait conditions.
除了垂直地面反作用力（GRF）外，具有更大外力臂的前后向 GRF 可能是另一种导致过度使用性跑步损伤的重复性冲击力量。在这项研究中，在鞋底和地面之间放置了一个剪切垫装置，以减少不仅垂直加载，而且还减少行走和跑步时的前后向加载。在这项研究中，招募了 15 名健康的男性跑步者，他们被归类为脚跟触地者（身高：173.2 +/- 4.7cm，体重：68.5 +/- 5.6kg）。要求参与者穿着三种不同鞋底凹槽设计的鞋子（常规、直槽和 45 度槽）行走（2.5m/s）、慢跑（3.5m/s）和跑步（4.2m/s）。直槽和 45 度槽鞋底在行走、慢跑和跑步时都提供了明显的剪切移位，并延迟了行走时首次出现前向后 GRF 的峰值时间。直槽鞋底降低了慢跑（p = 0.010）和跑步（p = 0.010）时的垂直加载率，并延迟了所有步态条件下首次出现垂直 GRF 的峰值时间。这些发现表明，鞋底凹槽设计可以在各种步态条件下改变垂直加载率和首次出现前向后 GRF 的峰值时间。
