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Kinetic coupling in distal foot joints during walking
Lauren R Williams1, Elisa S Arch2, Dustin A Bruening3
1Brigham Young University, Provo, UT, 84602, USA. lauren.williams523@gmail.com.
Journal of Foot and Ankle Research
|July 24, 2023
Summary
Restricting first metatarsophalangeal (MTP) joint motion during walking reduced midtarsal joint motion and work. This highlights the interconnectedness of foot joints during locomotion and informs interventions.
Area of Science:
- Biomechanics
- Human Movement Science
Background:
- Kinematic coupling between the first metatarsophalangeal (MTP) and midtarsal joints is known during gait.
- Kinetic foot coupling during walking and its contributing factors remain less understood.
Purpose of the Study:
- To investigate kinematic and kinetic coupling within the foot.
- To examine the effects of restricting MTP motion on the midtarsal joint during overground walking.
Main Methods:
- A randomized cross-over study with 26 participants.
- Motion capture and a pressure/shear sensing device were used.
- Participants walked with restricted MTP motion (neutral/extended brace) and without restriction.
Main Results:
- Restricting MTP motion decreased peak MTP motion by 19% and midtarsal motion by 9.8%.
- Kinetic analysis showed reduced work absorbed by the MTP joint and generated by the midtarsal joint when MTP motion was restricted.
Conclusions:
- Findings suggest significant coupling between the MTP and midtarsal joints during walking.
- Interventions targeting MTP joint work should consider the concurrent effects on the midtarsal joint.
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