@article{Weinert-Aplin:2015,
author = {Weinert-Aplin, RA and Bull, AMJ and McGregor, AH},
journal = {Journal of Sports Science and Medicine},
pages = {459--465},
title = {Investigating the Effects of Knee Flexion during the Eccentric Heel-Drop Exercise},
url = {http://hdl.handle.net/10044/1/26997},
volume = {14},
year = {2015}
}

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TY  - JOUR
AB  - This study aimed to characterise the biomechanics of the widelypracticed eccentric heel-drop exercises used in the managementof Achilles tendinosis. Specifically, the aim was to quantifychanges in lower limb kinematics, muscle lengths and Achillestendon force, when performing the exercise with a flexed kneeinstead of an extended knee. A musculoskeletal modelling approachwas used to quantify any differences between theseversions of the eccentric heel drop exercises used to treat Achillestendinosis. 19 healthy volunteers provided a group fromwhich optical motion, forceplate and plantar pressure data wererecorded while performing both the extended and flexed kneeeccentric heel-drop exercises over a wooden step when barefootor wearing running shoes. This data was used as inputs into ascaled musculoskeletal model of the lower limb. Range of anklemotion was unaffected by knee flexion. However, knee flexionwas found to significantly affect lower limb kinematics, intersegmentalloads and triceps muscle lengths. Peak Achilles loadwas not influenced despite significantly reduced peak ankleplantarflexion moments (p < 0.001). The combination of reducedtriceps lengths and greater ankle dorsiflexion, coupledwith reduced ankle plantarflexion moments were used to providea basis for previously unexplained observations regardingthe effect of knee flexion on the relative loading of the tricepsmuscles during the eccentric heel drop exercises. This findingquestions the role of the flexed knee heel drop exercise whenspecifically treating Achilles tendinosis
AU  - Weinert-Aplin,RA
AU  - Bull,AMJ
AU  - McGregor,AH
EP  - 465
PY  - 2015///
SN  - 1303-2968
SP  - 459
TI  - Investigating the Effects of Knee Flexion during the Eccentric Heel-Drop Exercise
T2  - Journal of Sports Science and Medicine
UR  - http://hdl.handle.net/10044/1/26997
VL  - 14
ER  - 

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