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Effect of speed and gradient on plantar force when running on an AlterG® treadmill

BACKGROUND: Anti-gravity treadmills are used to decrease musculoskeletal loading during treadmill running often in return to play rehabilitation programs. The effect different gradients (uphill/downhill running) have on kinetics and spatiotemporal parameters when using an AlterG® treadmill is unclea...

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Autores principales: Thomson, Athol, Whiteley, Rodney, Hansen, Clint, Welzel, Julius, Racinais, Sebastien, Wilson, Mathew G.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8011121/
https://www.ncbi.nlm.nih.gov/pubmed/33785050
http://dx.doi.org/10.1186/s13102-021-00258-4
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author Thomson, Athol
Whiteley, Rodney
Hansen, Clint
Welzel, Julius
Racinais, Sebastien
Wilson, Mathew G.
author_facet Thomson, Athol
Whiteley, Rodney
Hansen, Clint
Welzel, Julius
Racinais, Sebastien
Wilson, Mathew G.
author_sort Thomson, Athol
collection PubMed
description BACKGROUND: Anti-gravity treadmills are used to decrease musculoskeletal loading during treadmill running often in return to play rehabilitation programs. The effect different gradients (uphill/downhill running) have on kinetics and spatiotemporal parameters when using an AlterG® treadmill is unclear with previous research focused on level running only. METHODS: Ten well-trained healthy male running athletes ran on the AlterG® treadmill at varying combinations of bodyweight support (60, 80, and 100% BW), speed (12 km/hr., 15 km/hr., 18 km/hr., 21 km/hr., and 24 km/hr), and gradients (− 15% decline, − 10, − 5, 0, + 5, + 10 + 15% incline), representing a total of 78 conditions performed in random order. Maximum plantar force and contact time were recorded using a wireless in-shoe force sensor insole system. RESULTS: Regression analysis showed a linear relationship for maximum plantar force with bodyweight support and running speeds for level running (p < 0.0001, adj. R(2) = 0.604). The linear relationship, however, does not hold for negative gradients at speeds 12 & 15 km/h, with a relative ‘dip’ in maximum plantar force across all assisted bodyweight settings. CONCLUSIONS: Maximum plantar force peaks are larger with faster running and smaller with more AlterG® assisted bodyweight support (athlete unweighing). Gradient made little difference except for a downhill grade of − 5% decreasing force peaks as compared to level or uphill running. SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1186/s13102-021-00258-4.
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spelling pubmed-80111212021-03-31 Effect of speed and gradient on plantar force when running on an AlterG® treadmill Thomson, Athol Whiteley, Rodney Hansen, Clint Welzel, Julius Racinais, Sebastien Wilson, Mathew G. BMC Sports Sci Med Rehabil Research Article BACKGROUND: Anti-gravity treadmills are used to decrease musculoskeletal loading during treadmill running often in return to play rehabilitation programs. The effect different gradients (uphill/downhill running) have on kinetics and spatiotemporal parameters when using an AlterG® treadmill is unclear with previous research focused on level running only. METHODS: Ten well-trained healthy male running athletes ran on the AlterG® treadmill at varying combinations of bodyweight support (60, 80, and 100% BW), speed (12 km/hr., 15 km/hr., 18 km/hr., 21 km/hr., and 24 km/hr), and gradients (− 15% decline, − 10, − 5, 0, + 5, + 10 + 15% incline), representing a total of 78 conditions performed in random order. Maximum plantar force and contact time were recorded using a wireless in-shoe force sensor insole system. RESULTS: Regression analysis showed a linear relationship for maximum plantar force with bodyweight support and running speeds for level running (p < 0.0001, adj. R(2) = 0.604). The linear relationship, however, does not hold for negative gradients at speeds 12 & 15 km/h, with a relative ‘dip’ in maximum plantar force across all assisted bodyweight settings. CONCLUSIONS: Maximum plantar force peaks are larger with faster running and smaller with more AlterG® assisted bodyweight support (athlete unweighing). Gradient made little difference except for a downhill grade of − 5% decreasing force peaks as compared to level or uphill running. SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1186/s13102-021-00258-4. BioMed Central 2021-03-30 /pmc/articles/PMC8011121/ /pubmed/33785050 http://dx.doi.org/10.1186/s13102-021-00258-4 Text en © The Author(s) 2021 Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated in a credit line to the data.
spellingShingle Research Article
Thomson, Athol
Whiteley, Rodney
Hansen, Clint
Welzel, Julius
Racinais, Sebastien
Wilson, Mathew G.
Effect of speed and gradient on plantar force when running on an AlterG® treadmill
title Effect of speed and gradient on plantar force when running on an AlterG® treadmill
title_full Effect of speed and gradient on plantar force when running on an AlterG® treadmill
title_fullStr Effect of speed and gradient on plantar force when running on an AlterG® treadmill
title_full_unstemmed Effect of speed and gradient on plantar force when running on an AlterG® treadmill
title_short Effect of speed and gradient on plantar force when running on an AlterG® treadmill
title_sort effect of speed and gradient on plantar force when running on an alterg® treadmill
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8011121/
https://www.ncbi.nlm.nih.gov/pubmed/33785050
http://dx.doi.org/10.1186/s13102-021-00258-4
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