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Neuromechanical adaptations of foot function when hopping on a damped surface
To preserve motion, humans must adopt actuator-like dynamics to replace energy that is dissipated during contact with damped surfaces. Our ankle plantar flexors are credited as the primary source of work generation. Our feet and their intrinsic foot muscles also appear to be an important source of g...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Physiological Society
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9744637/ https://www.ncbi.nlm.nih.gov/pubmed/36227162 http://dx.doi.org/10.1152/japplphysiol.00012.2022 |
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author | Birch, Jonathon V. Farris, Dominic J. Riddick, Ryan Cresswell, Andrew G. Dixon, Sharon J. Kelly, Luke A. |
author_facet | Birch, Jonathon V. Farris, Dominic J. Riddick, Ryan Cresswell, Andrew G. Dixon, Sharon J. Kelly, Luke A. |
author_sort | Birch, Jonathon V. |
collection | PubMed |
description | To preserve motion, humans must adopt actuator-like dynamics to replace energy that is dissipated during contact with damped surfaces. Our ankle plantar flexors are credited as the primary source of work generation. Our feet and their intrinsic foot muscles also appear to be an important source of generative work, but their contributions to restoring energy to the body remain unclear. Here, we test the hypothesis that our feet help to replace work dissipated by a damped surface through controlled activation of the intrinsic foot muscles. We used custom-built platforms to provide both elastic and damped surfaces and asked participants to perform a bilateral hopping protocol on each. We recorded foot motion and ground reaction forces, alongside muscle activation, using intramuscular electromyography from flexor digitorum brevis, abductor hallucis, soleus, and tibialis anterior. Hopping in the Damped condition resulted in significantly greater positive work and contact-phase muscle activation compared with the Elastic condition. The foot contributed 25% of the positive work performed about the ankle, highlighting the importance of the foot when humans adapt to different surfaces. NEW & NOTEWORTHY Adaptable foot mechanics play an important role in how we adjust to elastic surfaces. However, natural substrates are rarely perfectly elastic and dissipate energy. Here, we highlight the important role of the foot and intrinsic foot muscles in contributing to replacing dissipated work on damped surfaces and uncover an important energy-saving mechanism that may be exploited by the designers of footwear and other wearable devices. |
format | Online Article Text |
id | pubmed-9744637 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | American Physiological Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-97446372022-12-20 Neuromechanical adaptations of foot function when hopping on a damped surface Birch, Jonathon V. Farris, Dominic J. Riddick, Ryan Cresswell, Andrew G. Dixon, Sharon J. Kelly, Luke A. J Appl Physiol (1985) Research Article To preserve motion, humans must adopt actuator-like dynamics to replace energy that is dissipated during contact with damped surfaces. Our ankle plantar flexors are credited as the primary source of work generation. Our feet and their intrinsic foot muscles also appear to be an important source of generative work, but their contributions to restoring energy to the body remain unclear. Here, we test the hypothesis that our feet help to replace work dissipated by a damped surface through controlled activation of the intrinsic foot muscles. We used custom-built platforms to provide both elastic and damped surfaces and asked participants to perform a bilateral hopping protocol on each. We recorded foot motion and ground reaction forces, alongside muscle activation, using intramuscular electromyography from flexor digitorum brevis, abductor hallucis, soleus, and tibialis anterior. Hopping in the Damped condition resulted in significantly greater positive work and contact-phase muscle activation compared with the Elastic condition. The foot contributed 25% of the positive work performed about the ankle, highlighting the importance of the foot when humans adapt to different surfaces. NEW & NOTEWORTHY Adaptable foot mechanics play an important role in how we adjust to elastic surfaces. However, natural substrates are rarely perfectly elastic and dissipate energy. Here, we highlight the important role of the foot and intrinsic foot muscles in contributing to replacing dissipated work on damped surfaces and uncover an important energy-saving mechanism that may be exploited by the designers of footwear and other wearable devices. American Physiological Society 2022-12-01 2022-10-13 /pmc/articles/PMC9744637/ /pubmed/36227162 http://dx.doi.org/10.1152/japplphysiol.00012.2022 Text en Copyright © 2022 The Authors https://creativecommons.org/licenses/by/4.0/Licensed under Creative Commons Attribution CC-BY 4.0 (https://creativecommons.org/licenses/by/4.0/) . Published by the American Physiological Society. |
spellingShingle | Research Article Birch, Jonathon V. Farris, Dominic J. Riddick, Ryan Cresswell, Andrew G. Dixon, Sharon J. Kelly, Luke A. Neuromechanical adaptations of foot function when hopping on a damped surface |
title | Neuromechanical adaptations of foot function when hopping on a damped surface |
title_full | Neuromechanical adaptations of foot function when hopping on a damped surface |
title_fullStr | Neuromechanical adaptations of foot function when hopping on a damped surface |
title_full_unstemmed | Neuromechanical adaptations of foot function when hopping on a damped surface |
title_short | Neuromechanical adaptations of foot function when hopping on a damped surface |
title_sort | neuromechanical adaptations of foot function when hopping on a damped surface |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9744637/ https://www.ncbi.nlm.nih.gov/pubmed/36227162 http://dx.doi.org/10.1152/japplphysiol.00012.2022 |
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