Perrin T P, Morio C Y M, Besson T, Kerhervé H A, Millet G Y, Rossi J
Univ Lyon, UJM-Saint-Etienne, Inter-university Laboratory of Human Movement Biology, EA 7424, F-42023 Saint-Etienne, France; ENS Rennes, Bruz, France.
Decathlon SportsLab, Movement Sciences Department, Lille, France.
J Biomech. 2023 Jan;146:111410. doi: 10.1016/j.jbiomech.2022.111410. Epub 2022 Dec 5.
This study investigated the effects of marker placement (skin- vs shoe-mounted) on metatarsophalangeal joint (MTP) kinematics and kinetics during running. Fifteen trained men ran on a 15-m track at 10 and 13 km/h with three (low, standard and high stiffness) shoe longitudinal bending stiffnesses (LBS). Reflective markers were fixed on the shoe upper, and on the skin using holes cut in the shoe. Three-dimensional marker positions and ground reaction forces were recorded at 200 and 2000 Hz, respectively. Kinematic and kinetic parameters were analyzed using one-dimensional metrics (statistical parametric mapping). MTP joint was less dorsiflexed at midstance ([57% to 100%] of braking phase and [0% to 48%] of pushing phase), and the MTP joint plantarflexion moment was higher ([22% to 55%] of pushing phase) with the shoe markerset in comparison with the skin markerset. The effect of LBS on MTP angle was found to be significant for a larger percentage of each stride using the shoe markerset compared to the skin markerset. However, the effect of LBS on plantarflexion moment was significant with the shoe markerset only. The effect of running speed on MTP angle was significant for a larger percentage of each stride with the skin markerset. This study demonstrates that the placement of markers influences the measurement of MTP kinematics and kinetics and that these effects are mediated by other variables such as LBS or running speed. It is concluded that the shoe markerset does not fully reflect the movement of the MTP joint.
本研究调查了标记放置位置（安装在皮肤上与安装在鞋子上）对跑步过程中跖趾关节（MTP）运动学和动力学的影响。15名经过训练的男性在15米的跑道上以10公里/小时和13公里/小时的速度跑步，所穿鞋子具有三种（低、标准和高刚度）纵向弯曲刚度（LBS）。反光标记固定在鞋面上，并通过在鞋子上切割的孔固定在皮肤上。分别以200赫兹和2000赫兹的频率记录三维标记位置和地面反作用力。使用一维指标（统计参数映射）分析运动学和动力学参数。与皮肤标记组相比，在支撑中期（制动阶段的[57%至100%]和推进阶段的[0%至48%]），MTP关节背屈角度更小，并且在推进阶段的[22%至55%]，使用鞋子标记组时MTP关节跖屈力矩更高。与皮肤标记组相比，使用鞋子标记组时，在每个步幅更大比例的时间内，LBS对MTP角度的影响显著。然而，LBS对跖屈力矩的影响仅在鞋子标记组中显著。使用皮肤标记组时，在每个步幅更大比例的时间内，跑步速度对MTP角度的影响显著。本研究表明，标记的放置会影响MTP运动学和动力学的测量，并且这些影响由LBS或跑步速度等其他变量介导。得出的结论是，鞋子标记组不能完全反映MTP关节的运动。
