Quantifying mechanical loading and elastic strain energy of the human Achilles tendon during walking and running
| Autor: | Christos Theodorakis, M. R. Kharazi, Adamantios Arampatzis, Falk Mersmann, Sebastian Bohm |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Adult
Male Materials science 152 Sinneswahrnehmung Bewegung Emotionen physiologische Triebe Physiology Science Kinematics Isometric exercise Walking Rotation Achilles Tendon Article Running ddc:152 medicine Humans Treadmill Achilles tendon Elastic energy Elasticity Tendon Biomechanical Phenomena Bone quality and biomechanics medicine.anatomical_structure Medicine Female Stress Mechanical Ankle Biomedical engineering |
| Zdroj: | Scientific Reports Scientific Reports, Vol 11, Iss 1, Pp 1-13 (2021) |
| ISSN: | 2045-2322 |
| Popis: | The purpose of the current study was to assess Achilles tendon (AT) mechanical loading and strain energy during locomotion using a new in vivo approach for measuring AT length that considers the AT curve-path shape. Eleven participants walked at 1.4 m/s and ran at 2.5 m/s and 3.5 m/s on a treadmill. AT length, defined as the distance between its origin at the gastrocnemius medialis myotendinous junction (MTJ) and the calcaneal insertion, was determined experimentally by integrating kinematics and ultrasound analysis. Small foil markers were placed on the skin covering the AT path from the origin to the insertion, and the MTJ, tracked using ultrasonography, was projected to the reconstructed skin to account for their misalignment. Skin-to-bone displacements were assessed during a passive rotation (5 °/s) of the ankle joint and considered in the calculation of AT length. Force and strain energy of the AT during locomotion were calculated by fitting a quadratic function to the experimentally measured tendon force-length curve obtained from maximum voluntary isometric contractions. Maximum AT strain and force were affected by speed (pSummary statementA new accurate in vivo approach to assess Achilles tendon strain, force and strain energy during locomotion. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|