Shorter heels are linked with greater elastic energy storage in the Achilles tendon.

Title

Shorter heels are linked with greater elastic energy storage in the Achilles tendon.

Creator

Foster AD; Block B; Capobianco III F; Peabody J T; Puleo NA; Vegas A; Young J W

Publisher

Scientific Reports

Date

2021
2021-04-30

Description

Previous research suggests that the moment arm of the m. triceps surae tendon (i.e., Achilles tendon), is positively correlated with the energetic cost of running. This relationship is derived from a model which predicts that shorter ankle moment arms place larger loads on the Achilles tendon, which should result in a greater amount of elastic energy storage and return. However, previous research has not empirically tested this assumed relationship. We test this hypothesis using an inverse dynamics approach in human subjects (n = 24) at speeds ranging from walking to sprinting. The spring function of the Achilles tendon was evaluated using specific net work, a metric of mechanical energy production versus absorption at a limb joint. We also combined kinematic and morphological data to directly estimate tendon stress and elastic energy storage. We find that moment arm length significantly determines the spring-like behavior of the Achilles tendon, as well as estimates of mass-specific tendon stress and elastic energy storage at running and sprinting speeds. Our results provide support for the relationship between short Achilles tendon moment arms and increased elastic energy storage, providing an empirical mechanical rationale for previous studies demonstrating a relationship between calcaneal length and running economy. We also demonstrate that speed and kinematics moderate tendon performance, suggesting a complex relationship between lower limb geometry and foot strike pattern. [ABSTRACT FROM AUTHOR]

Subject

KINEMATICS; ACHILLES tendon; ENERGY storage; GEOMETRY; RUNNING

Identifier

Rights

Article information provided for research and reference use only. All rights are retained by the journal listed under publisher and/or the creator(s).

Format

journalArticle

URL Address

Search for Full-text

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Pages

1-11

Issue

1

Volume

11

ISSN

20452322

NEOMED College

NEOMED College of Medicine

NEOMED Department

Department of Anatomy & Neurobiology

Update Year & Number

May 2021 List

Citation

Foster AD; Block B; Capobianco III F; Peabody J T; Puleo NA; Vegas A; Young J W, “Shorter heels are linked with greater elastic energy storage in the Achilles tendon.,” NEOMED Bibliography Database, accessed October 17, 2021, https://neomed.omeka.net/items/show/11663.

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