Metatarsophalangeal Joint Dynamic Stiffness During Toe Rocker Changes With Walking Speed

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Author(s)Nigro, Luke
Author(s)Arch, Elisa S.
Date Accessioned2022-10-04T19:40:52Z
Date Available2022-10-04T19:40:52Z
Publication Date2022-09-12
DescriptionAccepted author manuscript version reprinted, by permission, from Journal of Applied Biomechanics, 2022, 38 (5): 320-327, https://doi.org/10.1123/jab.2021-0385. © Human Kinetics, Inc.en_US
AbstractDynamic joint stiffness (or simply “stiffness”) is a customization criteria used to tune mechanical properties of orthotic and prosthetic devices. This study examines metatarsophalangeal (MTP) joint stiffness during the toe-rocker phase of barefoot walking and establishes baseline characteristics of MTP joint stiffness. Ten healthy individuals walked at 4 speeds (0.4, 0.6, 0.8, and 1.0 statures·s−1) over level ground. MTP sagittal plane joint angles and moments were calculated during the toe-rocker phase of stance. Least-squares linear regressions were conducted on the MTP moment versus angle curve to determine joint stiffness during early toe rocker and late toe rocker. Multilevel linear models were used to test for statistically significant differences between conditions. Early toe rocker stiffness was positive, while late toe rocker was negative. Both early toe rocker and late toe rocker stiffness increased in magnitude significantly with speed. This study establishes baseline characteristics of MTP joint stiffness in healthy walking, which previously had not been examined through a range of controlled walking speeds. This information can be used in the future as design criteria for orthotic and prosthetic ankle and ankle–foot devices that can imitate, support, and facilitate natural human foot motion during walking better than existing devices.en_US
SponsorThis research is based upon work supported by the National Science Foundation’s Graduate Research Fellowship under Grant No.1940700. Any opinions, findings, and conclusions, or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation.en_US
CitationNigro, L., & Arch, E. S. (2022). Metatarsophalangeal Joint Dynamic Stiffness During Toe Rocker Changes With Walking Speed, Journal of Applied Biomechanics, 38(5), 320-327. https://doi.org/10.1123/jab.2021-0385en_US
ISSN1543-2688
URLhttps://udspace.udel.edu/handle/19716/31433
Languageen_USen_US
PublisherJournal of Applied Biomechanicsen_US
Keywordsdynamic joint stiffnessen_US
Keywordsgaiten_US
Keywordsfoot and ankleen_US
TitleMetatarsophalangeal Joint Dynamic Stiffness During Toe Rocker Changes With Walking Speeden_US
TypeArticleen_US
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