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The effect of chronic instability on frontal plane ankle kinematics during netball landing tasks
Abstract   Peer reviewed

The effect of chronic instability on frontal plane ankle kinematics during netball landing tasks

C Hiller, A Attenborough, P Sinclair, Max Stuelcken and R Smith
Foot and Ankle Surgery, Vol.22(2, Supplement 1), p.10
Foot International 2016 (Berlin, Germany, 23-Jun-2016–25-Jun-2016)
2016
DOI: https://doi.org/10.1016/j.fas.2016.05.009
url
https://doi.org/10.1016/j.fas.2016.05.009View
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Abstract

Clinical Sciences
Background: Netball is a sport where ankle sprains are common and chronic ankle instability (CAI) is highly prevalent. Incorrect landings have been identified as a common cause of injury, however, currently unknown is how CAI affects ankle landing kinematics during netball related movements. Aims: To compare the frontal plane, three-dimensional ankle kinematics of two netball tasks between netball players with CAI and netball players with no ankle sprain history. Methods: Thirteen netball players performed a 45 degree cutting task and a catch-and-stop task involving a sudden stop. Seven participants had no history of ankle sprain and six participants had CAI. A three-dimensional motion analysis system collected kinematic data. Results: During the cutting task, the instability group demonstrated a less inverted ankle position for 40% of the stance phase when compared to the control group, and a maximum inversion angular velocity that occurred closer to toe-off (p = 0.000). During the catch-and-stop task, the instability group displayed a maximum eversion angular velocity that occurred closer to initial contact (p = 0.001). No group differences were observed for either movement task for range of motion or ankle angle at initial contact (p > 0.05). Conclusions: The results are the first to provide CAI movement data on a sports specific population group, performing sport specific actions. The more neutral position of the ankle during the cutting task may reflect a subconscious effort of the instability group to control ankle movement and ultimately protect the joint from sprain.

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