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09.08.2015 | Ankle | Ausgabe 4/2016

Knee Surgery, Sports Traumatology, Arthroscopy 4/2016

Kinematics and muscle activities of the lower limb during a side-cutting task in subjects with chronic ankle instability

Zeitschrift:
Knee Surgery, Sports Traumatology, Arthroscopy > Ausgabe 4/2016
Autoren:
Yuta Koshino, Tomoya Ishida, Masanori Yamanaka, Yuya Ezawa, Takumi Okunuki, Takumi Kobayashi, Mina Samukawa, Hiroshi Saito, Harukazu Tohyama

Abstract

Purpose

The purpose of the present study was to evaluate lower limb kinematics and muscular activities during walking, side-turning while walking, and side-cutting movement in athletes with chronic ankle instability and compare the results to those of athletes without chronic ankle instability.

Methods

Lower limb kinematics and muscular activities were evaluated in 10 athletes with chronic ankle instability and 10 healthy control athletes using a three-dimensional motion analysis system and surface electromyography during the 200-ms pre-initial contact (IC) and stance phases while walking, side-turning while walking, and side-cutting.

Results

During walking or side-turning while walking, there were no significant differences in kinematics or muscle activities between the subjects with and without chronic ankle instability. For the side-cutting task, however, ankle inversion angles during the 200-ms pre-IC and late stance phases [effect sizes (ESs) = 0.95–1.43], the hip flexion angle (ESs = 0.94–0.96) and muscular activities of the gastrocnemius medialis (ESs = 1.04–1.73) during the early stance phase were significantly greater in the athletes with chronic ankle instability than in the healthy control athletes.

Conclusions

Alterations of kinematics in athletes with chronic ankle instability were found not only at the ankle but also at hip joints during the side-cutting movement. These alterations were not detected during walking or side-turning while walking. The findings of the present study indicate that clinicians should take into account the motion of the hip joint during the side-cutting movement in persons with chronic ankle instability.

Level of evidence

III.

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