Related Experiment Video
Updated: Sep 2, 2025
Evaluating Postural Control and Lower-extremity Muscle Activation in Individuals with Chronic Ankle Instability
Published on: September 18, 2020
Lower limb kinematics during single leg landing in three directions in individuals with chronic ankle instability
Daiki Kawahara1, Yuta Koshino2, Kentaro Watanabe1
1Faculty of Health Sciences, Hokkaido University, Sapporo, Japan.
Objectives:
To compare the lower limb kinematics of participants with chronic ankle instability (CAI) and healthy participants during forward, lateral, and medial landings.
Design:
Cross-sectional study.
Setting:
Laboratory.
Participants:
Eighteen athletes with CAI and 18 control athletes.
Main Outcome Measures:
Hip, knee, and ankle joint kinematics during forward, lateral, and medial single-leg landings were compared between the groups using two-way ANOVA for discrete values and statistical parametric mapping two-sample t-tests for time-series data.
Results:
The CAI group had significantly greater ankle dorsiflexion than the control group (P ≤ 0.013), which was observed from the pre-initial contact (IC) for lateral and medial landings and post-IC for forward landing. The CAI group showed greater knee flexion than the control group from the IC for lateral landing and post-IC for forward landing (P ≤ 0.014). No significant differences in ankle inversion kinematics were found between the CAI and control groups. Lateral landing had a greater peak inversion angle and velocity than forward and medial landings (P < 0.001). Medial landing had a greater inversion velocity than forward landing (P < 0.001).
Conclusions:
This study suggests that individuals with CAI show feedforward protective adaptations in the pre-landing phase for lateral and medial landings.
