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Changes in ankle work, foot work, and tibialis anterior activation throughout a long run

Honert, Eric C.; Ostermair, Florian; Tscharner, Vinzenz von; Nigg, Benno M.

Abstract:
Background
The ankle and foot together contribute to over half of the positive and negative work performed by the lower limbs during running. Yet, little is known about how foot kinetics change throughout a run. The amount of negative foot work may decrease as tibialis anterior (TA) electromyography (EMG) changes throughout longer-duration runs. Therefore, we examined ankle and foot work as well as TA EMG changes throughout a changing-speed run.

Methods
Fourteen heel-striking subjects ran on a treadmill for 58 min. We collected ground reaction forces, motion capture, and EMG. Subjects ran at 110%, 100%, and 90% of their 10-km running speed and 2.8 m/s multiple times throughout the run. Foot work was evaluated using the distal rearfoot work, which provides a net estimate of all work contributors within the foot.

Results
Positive foot work increased and positive ankle work decreased throughout the run at all speeds. At the 110% 10-km running speed, negative foot work decreased and TA EMG frequency shifted lower throughout the run. The increase in positive foot work may be attributed to increased foot joint work performed by intrinsic foot muscles. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000131689
Veröffentlicht am 23.04.2021
Originalveröffentlichung
DOI: 10.1016/j.jshs.2021.02.003
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Sport und Sportwissenschaft (IfSS)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 2095-2546, 2213-2961
KITopen-ID: 1000131689
Erschienen in Journal of Sport and Health Science
Verlag Elsevier
Nachgewiesen in Scopus
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