{"title":"慢性踝关节不稳患者从不同高度着地的不同策略","authors":"","doi":"10.1016/j.gaitpost.2024.09.008","DOIUrl":null,"url":null,"abstract":"<div><h3>Background</h3><p>Lateral ankle sprain (LAS) usually occurs during landing from heights among people with chronic ankle instability (CAI). Although the kinematics when landing on the flat surface has been reported, no studies have explored the effect of different heights on the landing strategies using a trapdoor device among people with CAI.</p></div><div><h3>Research question</h3><p>Do people with CAI adopt different landing strategies when drop-landing on the trapdoor device from three heights?</p></div><div><h3>Methods</h3><p>Thirty-one participants with CAI (24 males and 7 females, age=21.1±1.8 years, height=176.9±7.4 cm, body mass=71.9±9.2 kg, injured side=18 R&13 L) were recruited. They dropped from three different heights (low height (16 cm), medium height (23 cm), high height (30 cm)) with their affected foot landing on a movable surface of a trapdoor device, which was tilted 24° inward and 15° forward to simulate LAS. Kinematic data was collected using a twelve-camera motion capture system. One-way analysis of variance with repeated measures was used to compare the differences between the three heights.</p></div><div><h3>Results</h3><p>Significant height effects were detected in the peak ankle inversion angle (p=0.009, η<sup>2</sup><sub>p</sub>=0.280) and angular velocity (p<0.001, η<sup>2</sup><sub>p</sub>=0.444), and the peak ankle plantarflexion (p=0.002, η<sup>2</sup><sub>p</sub>=0.360), knee flexion (p<0.001, η<sup>2</sup><sub>p</sub>=0.555), and hip flexion (p=0.030, η<sup>2</sup><sub>p</sub>=0.215) angles at the time of peak ankle inversion. Post-hoc tests showed that all the angles and velocities were higher at a low height than at medium (p: 0.001–0.045, <em>d</em>: 0.14–0.44) and high heights (p: 0.001–0.023, <em>d</em>: 0.28–0.66), except for the ankle plantarflexion angle, which was lower at a low height than at medium (p<0.001, <em>d</em>=0.44) and high (p=0.021, <em>d</em>=0.38) heights.</p></div><div><h3>Significance</h3><p>People with CAI adopt a protective strategy during drop-landing at medium and high heights compared to a low height. This strategy involves increased ankle dorsiflexion angle as well as knee and hip flexion angles.</p></div>","PeriodicalId":12496,"journal":{"name":"Gait & posture","volume":null,"pages":null},"PeriodicalIF":2.2000,"publicationDate":"2024-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Different strategies for landing from different heights among people with chronic ankle instability\",\"authors\":\"\",\"doi\":\"10.1016/j.gaitpost.2024.09.008\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><h3>Background</h3><p>Lateral ankle sprain (LAS) usually occurs during landing from heights among people with chronic ankle instability (CAI). Although the kinematics when landing on the flat surface has been reported, no studies have explored the effect of different heights on the landing strategies using a trapdoor device among people with CAI.</p></div><div><h3>Research question</h3><p>Do people with CAI adopt different landing strategies when drop-landing on the trapdoor device from three heights?</p></div><div><h3>Methods</h3><p>Thirty-one participants with CAI (24 males and 7 females, age=21.1±1.8 years, height=176.9±7.4 cm, body mass=71.9±9.2 kg, injured side=18 R&13 L) were recruited. They dropped from three different heights (low height (16 cm), medium height (23 cm), high height (30 cm)) with their affected foot landing on a movable surface of a trapdoor device, which was tilted 24° inward and 15° forward to simulate LAS. Kinematic data was collected using a twelve-camera motion capture system. One-way analysis of variance with repeated measures was used to compare the differences between the three heights.</p></div><div><h3>Results</h3><p>Significant height effects were detected in the peak ankle inversion angle (p=0.009, η<sup>2</sup><sub>p</sub>=0.280) and angular velocity (p<0.001, η<sup>2</sup><sub>p</sub>=0.444), and the peak ankle plantarflexion (p=0.002, η<sup>2</sup><sub>p</sub>=0.360), knee flexion (p<0.001, η<sup>2</sup><sub>p</sub>=0.555), and hip flexion (p=0.030, η<sup>2</sup><sub>p</sub>=0.215) angles at the time of peak ankle inversion. Post-hoc tests showed that all the angles and velocities were higher at a low height than at medium (p: 0.001–0.045, <em>d</em>: 0.14–0.44) and high heights (p: 0.001–0.023, <em>d</em>: 0.28–0.66), except for the ankle plantarflexion angle, which was lower at a low height than at medium (p<0.001, <em>d</em>=0.44) and high (p=0.021, <em>d</em>=0.38) heights.</p></div><div><h3>Significance</h3><p>People with CAI adopt a protective strategy during drop-landing at medium and high heights compared to a low height. This strategy involves increased ankle dorsiflexion angle as well as knee and hip flexion angles.</p></div>\",\"PeriodicalId\":12496,\"journal\":{\"name\":\"Gait & posture\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":2.2000,\"publicationDate\":\"2024-09-15\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Gait & posture\",\"FirstCategoryId\":\"3\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0966636224006155\",\"RegionNum\":3,\"RegionCategory\":\"医学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"NEUROSCIENCES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Gait & posture","FirstCategoryId":"3","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0966636224006155","RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"NEUROSCIENCES","Score":null,"Total":0}
Different strategies for landing from different heights among people with chronic ankle instability
Background
Lateral ankle sprain (LAS) usually occurs during landing from heights among people with chronic ankle instability (CAI). Although the kinematics when landing on the flat surface has been reported, no studies have explored the effect of different heights on the landing strategies using a trapdoor device among people with CAI.
Research question
Do people with CAI adopt different landing strategies when drop-landing on the trapdoor device from three heights?
Methods
Thirty-one participants with CAI (24 males and 7 females, age=21.1±1.8 years, height=176.9±7.4 cm, body mass=71.9±9.2 kg, injured side=18 R&13 L) were recruited. They dropped from three different heights (low height (16 cm), medium height (23 cm), high height (30 cm)) with their affected foot landing on a movable surface of a trapdoor device, which was tilted 24° inward and 15° forward to simulate LAS. Kinematic data was collected using a twelve-camera motion capture system. One-way analysis of variance with repeated measures was used to compare the differences between the three heights.
Results
Significant height effects were detected in the peak ankle inversion angle (p=0.009, η2p=0.280) and angular velocity (p<0.001, η2p=0.444), and the peak ankle plantarflexion (p=0.002, η2p=0.360), knee flexion (p<0.001, η2p=0.555), and hip flexion (p=0.030, η2p=0.215) angles at the time of peak ankle inversion. Post-hoc tests showed that all the angles and velocities were higher at a low height than at medium (p: 0.001–0.045, d: 0.14–0.44) and high heights (p: 0.001–0.023, d: 0.28–0.66), except for the ankle plantarflexion angle, which was lower at a low height than at medium (p<0.001, d=0.44) and high (p=0.021, d=0.38) heights.
Significance
People with CAI adopt a protective strategy during drop-landing at medium and high heights compared to a low height. This strategy involves increased ankle dorsiflexion angle as well as knee and hip flexion angles.
期刊介绍:
Gait & Posture is a vehicle for the publication of up-to-date basic and clinical research on all aspects of locomotion and balance.
The topics covered include: Techniques for the measurement of gait and posture, and the standardization of results presentation; Studies of normal and pathological gait; Treatment of gait and postural abnormalities; Biomechanical and theoretical approaches to gait and posture; Mathematical models of joint and muscle mechanics; Neurological and musculoskeletal function in gait and posture; The evolution of upright posture and bipedal locomotion; Adaptations of carrying loads, walking on uneven surfaces, climbing stairs etc; spinal biomechanics only if they are directly related to gait and/or posture and are of general interest to our readers; The effect of aging and development on gait and posture; Psychological and cultural aspects of gait; Patient education.