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- Title
Comparison of the distance between the talus and the lateral malleolus during single-leg drop landing in individuals with and without chronic ankle instability.
- Authors
Ayano Ishida; Noriaki Maeda; Satoshi Onoue; Makoto Komiya; Tsubasa Tashiro; Satoshi Arima; Rami Mizuta; Honoka Ishihara; Miki Kawai; Yukio Urabe
- Abstract
Introduction: Lateral ankle sprain (LAS) has high recurrence rate, which has considered to be associated with chronic ankle instability (CAI). Ankle instability in individuals with CAI has seemed as a risk of LAS re-injury, and LAS often occur during landing. A previous study used ultrasound imaging to measure the distance between the talus and lateral malleolus as an assessment of ankle instability. In previous study, this distance was greater in individuals with CAI than without.1 However, the distance has been only evaluated statically, and dynamics of the distance during landing is unknown. Objectives: To evaluate dynamics of the distance between the talus and lateral malleolus during single-leg drop landing and compare between with and without CAI. Study design: Cross-sectional study Methods: In total 12 adults (22 feet) were participated in this study, and they were divided into the healthy group (12 feet) and the CAI group (10 feet). The task movement was single-leg drop landing from a 30 cm high box. The distances between the talus and lateral malleolus during landing were measured using the ultrasound synchronized with a motion capture system. 2 The analysis was conducted from 400 ms before to 400 ms after initial contact (IC). To compare the distances between healthy group and CAI group, unpaired t-test was conducted. Results: The distance was significantly greater in the CAI group than the healthy group from 400 ms before to 400 ms after IC (p<0.01). Conclusions: The distance between the talus and the lateral malleolus was greater in the CAI group compared to the healthy group during drop landing, and this may reflect the ankle instability and be a risk for LAS re-injury. The result of this study suggests the necessity of compasating the ankle instabiltity of individuals with CAI during landing by taping, orthosis, muscle training and so on.
- Subjects
NORWAY; ANKLEBONE; BIOMECHANICS; CONFERENCES &; conventions; ANKLE joint; JUMPING; JOINT instability
- Publication
International Journal of Sports Physical Therapy, 2024, Vol 19, Issue 6, p775
- ISSN
2159-2896
- Publication type
Article