Citation

Mahaki M, Bruijn SM, van Dieen JH. PeerJ 2019; 7: e7939.

Affiliation

Faculty of Behavioural and Movement Sciences, VU University Amsterdam, Amsterdam, The Netherlands, Netherlands.

Copyright

(Copyright © 2019, PeerJ)

DOI

10.7717/peerj.7939

PMID

31681515

PMCID

PMC6822599

Abstract

It is still unclear how humans control mediolateral (ML) stability in walking and even more so for running. Here, foot placement strategy as a main mechanism to control ML stability was compared between walking and running. Moreover, to verify the role of foot placement as a means to control ML stability in both modes of locomotion, this study investigated the effect of external lateral stabilization on foot placement control. Ten young adults participated in this study. Kinematic data of the trunk (T₆) and feet were recorded during walking and running on a treadmill in normal and stabilized conditions. Correlation between ML trunk CoM state and subsequent ML foot placement, step width, and step width variability were assessed. Paired t-tests (either SPM1d or normal) were used to compare aforementioned parameters between normal walking and running. Two-way repeated measures ANOVAs (either SPM1d or normal) were used to test for effects of walking vs. running and of normal vs. stabilized condition. We found a stronger correlation between ML trunk CoM state and ML foot placement and significantly higher step width variability in walking than in running. The correlation between ML trunk CoM state and ML foot placement, step width, and step width variability were significantly decreased by external lateral stabilization in walking and running, and this reduction was stronger in walking than in running. We conclude that ML foot placement is coordinated to ML trunk CoM state to stabilize both walking and running and this coordination is stronger in walking than in running.

©2019 Mahaki et al.

Language: en

Keywords

Balance; External lateral stabilization; Foot placement strategy; Gait stability; Running; Stepping strategy; Walking