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Markers of motor control during the side hop test in the context of anterior cruciate ligament reconstruction

Urhausen, Anouk
(2018)

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Urhausen_22241100_2017-2018.pdf
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Details

Supervisors
Theisen, Daniel
Faculty
Faculté des sciences de la motricité
Degree label
Master [120] en sciences de la motricité, orientation générale
Abstract
The unilateral side hop (SH) test is commonly used to screen dynamic knee function following anterior cruciate ligament reconstruction (ACLr). The common criterion to evaluate SH performance neglects the quality of execution of the side hops, which could be an alternate marker for the return to sport decision. The aim of this study was to assess for the first time the relevance of spatiotemporal variables as quality markers in the comparison of patients 9 months post-ACLr and healthy controls. The amount of hamstring and quadriceps muscle activity was recorded by using surface electromyography (EMG) to analyse neuromuscular control. Spatiotemporal and EMG variables were compared by applying a mixed model analysis of variance. Patients performed a similar number of side hops than controls. Longer contact times were found in some participants, possibly relating to an increased need for stabilisation. The analysis of quality markers such as contact time allows to better objectify jump performance and shows the clinical relevance of including quality markers in the decision-making process of returning to physical activity. The evaluation of the muscle activity showed similar neuromuscular control between patients and controls. An overall high recruitment of the hamstrings muscles was found in operated and healthy participants. The markers of motor control will also be extended at earlier time points post-surgery with a more exhaustive analysis of complementary quality markers.