Individual variation in Achilles tendon morphology and geometry changes susceptibility to injury.

ABSTRACT: The unique structure of the Achilles tendon, combining three smaller sub-tendons, enhances movement efficiency by allowing individual control from connected muscles. This requires compliant interfaces between sub-tendons, but compliance decreases with age and may account for increased injury frequency. Current understanding of sub-tendon sliding and its role in the whole Achilles tendon function is limited. Here we show changing the degree of sliding greatly affects the tendon mechanical behaviour. Our in vitro testing discovered distinct sub-tendon mechanical properties in keeping with their mechanical demands. In silico study based on measured properties, subject-specific tendon geometry, and modified sliding capacity demonstrated age-related displacement reduction similar to our in vivo

SUBMITTER: Yin NH 

PROVIDER: S-EPMC7886322 | biostudies-literature | 2021 Feb

REPOSITORIES: biostudies-literature