Lower extremity work along with triceps surae structure and activation is altered with jumping after Achilles tendon repair

Journal of Orthopaedic Research : Official Publication of the Orthopaedic Research Society
Jennifer A ZellersKarin Grävare Silbernagel

Abstract

Achilles tendon rupture leads to long term plantar flexor deficits. The purpose of this study was to describe changes in jumping biomechanics along with triceps surae structure and activation in individuals after Achilles repair. Eleven individuals 1-3 years following Achilles repair and 10 healthy controls were included. Kinetics and kinematics, analyzed using a constituent lower extremity work (CLEW) approach, and muscle activity using surface electromyography (EMG) were collected during a unilateral hopping task. Triceps surae myotendinous structure was assessed using ultrasound imaging. There were no differences in jump height, absolute limb work, or cost of transport between groups. During takeoff, the knee did more (p < 0.001) and ankle did less concentric work (p < 0.001), and lateral gastrocnemius rate of rise was higher (p = 0.02) on the ruptured side. During landing, the knee did more eccentric work (p = 0.033) and lateral gastrocnemius (p = 0.003) and soleus (p = 0.02) activation amplitude prior to landing was higher on the ruptured side. Individuals after Achilles tendon repair shift work toward the knee and alter muscle recruitment. Differences in lateral gastrocnemius activity may indicate that it is well-situated...Continue Reading

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Citations

Sep 22, 2020·Disability and Rehabilitation·Megan C KirklandMichelle Ploughman
May 21, 2020·Translational Sports Medicine·Jennifer A ZellersKarin Grävare Silbernagel
Mar 5, 2021·Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA·Markus WenningJochen Paul
Jun 12, 2021·The American Journal of Sports Medicine·Jennifer A ZellersKarin Grävare Silbernagel
Oct 22, 2021·Journal of Orthopaedic Research : Official Publication of the Orthopaedic Research Society·Susanna AufwerberPaul W Ackermann

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