Muscle inertial contributions to ankle kinetics during the swing phase of running
Muscle inertial contributions to ankle kinetics during the swing phase of running
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DOI：
10.1016/j.jbiomech.2023.111455
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发表时间：
2023-01-24
影响因子：
2.4
通讯作者：
Yeo，Sang-Hoon
中科院分区：
文献类型：
--
作者：
Verheul，Jasper;Sueda，Shinjiro;Yeo，Sang-Hoon
骨骼肌具有惯性，导致惯性力作用在关节周围。尽管这些惯性肌肉力有助于关节动力学，但在用于人体运动生物力学研究的肌肉骨骼模型中通常不会考虑它们。忽略惯性力可能会导致关节动力学误差，但在常见运动的逆动力学计算中这些误差有多大尚不清楚。因此，我们研究了在不同速度跑步的摆动阶段小腿肌肉惯性对踝关节力矩的作用。使用定制的肌肉骨骼建模和模拟平台来执行逆动力学，该模型要么将肌肉质量合并到小腿总质量中，要么将腓肠肌外侧肌/内侧肌、比目鱼肌和胫骨前肌视为与小腿分开的质量。当肌肉被建模为单独的质量时，踝关节力矩受到相当大的影响，通常会转向减少的背屈力矩和更高的跖屈力矩。两种建模条件之间的差异随着跑步速度的增加而增加，范围在 0.8 至 1.6 Nm（踝关节力矩剖面均方根误差）、8-18%（峰值背屈力矩差异）和 24-42%（峰值跖屈力矩差异）之间。此外，我们观察到惯性力的复杂组合，特别是由于小腿的旋转和平移而产生的惯性力组合，其中惯性力的方向在摆动阶段发生变化。这些结果表明，忽略肌肉骨骼模型中的肌肉惯性可能会导致低估或高估结构特定载荷，从而得出错误的研究结论。我们的结果表明，在使用肌肉骨骼模型时应仔细考虑肌肉惯性力。
Skeletal muscles have inertia that leads to inertial forces acting around joints. Although these inertial muscle forces contribute to joint kinetics, they are not typically accounted for in musculoskeletal models used for human movement biomechanics research. Ignoring inertial forces can lead to errors in joint kinetics, but how large these errors are in inverse dynamics calculations of common movements is yet unclear. We, therefore, examined the role of shank muscle inertia on ankle joint moments during the swing phase of running at different speeds. A custom musculoskeletal modelling and simulation platform was used to perform inverse dynamics with a model that either combined muscle mass in the total shank mass, or considered the gastrocnemius lateralis/medialis, soleus, and tibialis anterior muscles as separate masses from the shank. Ankle moments were considerably affected when muscles were modelled as separate masses, with a general shift towards reduced dorsiflexion and higher plantarflexion moments. Differences between both modelling conditions increased with running speed and ranged between 0.8 and 1.6 Nm (ankle moment profile root mean square error), 8–18 % (peak dorsiflexion moment difference) and 24–42 % (peak plantarflexion moment difference). Moreover, we observed a complex combination of inertial forces, especially those due to rotation and translation of the shank, in which the direction of inertial force changed during the swing phase. These results show that ignoring muscle inertia in musculoskeletal models can lead to under- or overestimations of structure-specific loads and thus erroneous study conclusions. Our results suggest that muscle inertial forces should be carefully considered when using musculoskeletal models.