The impact of locomotor speed on the human metatarsophalangeal joint kinematics

Wang, K, Raychoudhury, S, Hu, D, Ren, L, Liu, J, Xiu, H, Liang, W, Li, B, Wei, G ORCID: and Qian, Z 2021, 'The impact of locomotor speed on the human metatarsophalangeal joint kinematics' , Frontiers in Bioengineering and Biotechnology, 9 , p. 644582.

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This paper aims to further our previous study to investigate the effect of speed on the human metatarsophalangeal (MP) joint kinematics during running on level ground. The 3D motion of the foot segments was captured by a twelve-camera motion analysis system, and the ground reaction forces and moments were recorded by using a six-force plate array. The relative movement between the tarsometatarsi (hindfoot) and phalanges (forefoot) segments were recorded to obtain the 3D orientation and position of the functional axis (FA) of the MP joint. The results show that the FA locates about an average of 19% foot length (FL) anterior to the anatomical axis (AA) across all running speeds, and is also 4.8% FL inferior to the AA during normal and fast run. Similar to walking, the functional axis is more oblique than the anatomical axis with a more anterior–inferior orientation across all the running speeds. This suggests that representing MP joint with the AA may mislead the calculation of joint moment/power and muscle moment arms in both running and walking gait. Compared with previous study, we found that walking and running speeds have statistically significant effects on the position of the FA. The functional axis moves frontward to a more anterior position when the speed increases during walking and running. It transfers upward in the superior direction with increasing speed of walking, but moves more toward the inferior position when the velocity increased further to running. Also, the orientation of FA in sagittal plane became more oblique toward the vertical direction as the speed increased. This may help in moderating the muscular effort, increase the muscle EMA and improve the locomotor performance. These results would contribute to understanding the in vivo biomechanical function of the MP joint and also the foot propulsion during human locomotion.

Item Type: Article
Contributors: Galbusera, F (Editor), Gu, Y (Reviewer) and Abrantes,, J (Reviewer)
Additional Information: ** From Frontiers via Jisc Publications Router ** Licence for this article: **Journal IDs: eissn 2296-4185 **History: published_online 20-04-2021; accepted 26-03-2021; collection 2021; submitted 21-12-2020
Schools: Schools > School of Computing, Science and Engineering
Journal or Publication Title: Frontiers in Bioengineering and Biotechnology
Publisher: Frontiers Media S.A.
ISSN: 2296-4185
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Funders: National Key R&D Program of China, National Natural Science Foundation of China, Chinese Postdoctoral International Exchange Program
SWORD Depositor: Publications Router
Depositing User: Publications Router
Date Deposited: 04 May 2021 14:02
Last Modified: 16 Feb 2022 07:07

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