Dynamic Ankle Control in Athletes With Ankle Instability During Sports Maneuvers

Lin, Cheng Feng; Chen, Chin Yang; Lin, Chia Wei

doi:10.1177/0363546511406868

Cited by 81 publications

(72 citation statements)

References 26 publications

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“…After landing, the CAI group had decreased ankle-joint stiffness during sporting maneuvers compared with controls. 25 The active peak force could represent the contractions of the lower limb muscles as they attempt to stabilize the ankle joint during the mid to late stance phases. More research is needed to correlate activation patterns of the lower extremity musculature in participants with CAI and their kinetic patterns.…”

Section: Discussionmentioning

confidence: 99%

Altered Vertical Ground Reaction Forces in Participants With Chronic Ankle Instability While Running

Bigouette

Simon

Liu

et al. 2016

Journal of Athletic Training

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Context: Altered gait kinetics may increase the risk of longterm injuries in participants with chronic ankle instability (CAI). Vertical ground reaction forces (vGRFs) can provide insight into how body loading is altered.Objective: To compare the components of vGRFs while running in participants with or without CAI.Design: Cohort study. Setting: University biomechanics laboratory.Patients or Other Participants: Twenty-four experienced, college-aged runners. Groups were categorized by the presence (CAI group) or absence (control group) of CAI through selfreported questionnaires.Intervention(s): After a warm-up period, all participants ran on an instrumented treadmill for 5 minutes at 3.3 m/s. Data were collected during the last 30 seconds. Five continuous trials of heel-to-toe running were identified per participant and averaged for statistical analysis.Main Outcome Measure(s): The dependent variables were impact peak force (N/body weight [BW]), active peak force (N/ BW), time to impact peak force (milliseconds), time to active peak force (milliseconds), and average loading rate ([N/BW]/s).Results: A difference was found between groups (P ¼ .002). The CAI group had higher impact peak forces (P ¼ .001) and active peak forces (P ¼ .002) compared with the control group. The CAI group also had an increased loading rate (P ¼ .001) and a shorter time to reach the active peak force (P ¼ .001) compared with the control group. No difference was seen between groups in the time to reach the impact peak force (P ¼ .952).Conclusions: Participants with CAI produced altered vGRFs and loading rates while running. Altered loading rates could predispose individuals with CAI to stress-related injuries and repetitive sprains.Key Words: biomechanics, gait, kinetics, stress fractures Key PointsThe group with chronic ankle instability demonstrated greater vertical ground reaction forces and initial and active peak forces. Those with chronic ankle instability also had increased loading rates, which could make them vulnerable to stress injuries and sprains.

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Section: Discussionmentioning

confidence: 99%

Altered Vertical Ground Reaction Forces in Participants With Chronic Ankle Instability While Running

Bigouette

Simon

Liu

et al. 2016

Journal of Athletic Training

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“…Increased rearfoot inversion has been reported before, at and immediately after initial contact (IC) during walking, throughout the gait cycle during walking and jogging, and in the pre landing phase of running [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

The effect of dual tasking on foot kinematics in people with functional ankle instability

2016

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Background: Some cases of repeated inversion ankle sprains are thought to have a neurological basis and are termed functional ankle instability (FAI). In addition to factors local to the ankle, such as loss of proprioception, cognitive demands have the ability to influence motor control and may increase the risk of repetitive lateral sprains.Objective: The purpose of this study was to investigate the effect of cognitive demand on foot kinematics in physically active people with functional ankle instability.

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“…the knee and the hip [10;12;13]. For the ankle joint, a more inverted position of the ankle has been shown during the postlanding phase of a stop-jump landing task [14] and during the pre-and postlanding phase of lateral hop [15], as well as a greater ankle dorsiflexion prior to and post landing in a single leg jump [12]. Notwithstanding some conflicting results, possibly caused by the different tasks observed, the observation of lower limb joint kinematics may well offer a window into the underlying mechanisms of CAI.…”

Section: Introductionmentioning

confidence: 99%

Multi-segment foot landing kinematics in subjects with chronic ankle instability

Ridder

Willems

Vanrenterghem

et al. 2015

Clinical Biomechanics

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Background: Chronic ankle instability has been associated with altered joint kinematics at the ankle, knee and hip. However, no studies have investigated possible kinematic deviations at more distal segments of the foot. The purpose of this study was to evaluate if subjects with ankle instability and copers show altered foot and ankle kinematics and altered kinetics during a landing task when compared to controls. Methods: 96 subjects (38 subjects with chronic ankle instability, 28 copers and 30 controls) performed a vertical drop and side jump task. Foot kinematics were obtained using the Ghent Foot Model and a single segment foot model. Group differences were evaluated using Statistical Parametric Mapping and analysis of variance. Results: Subjects with ankle instability had a more inverted midfoot position in relation to the rearfoot when compared to controls during the side jump. They also had a greater midfoot inversion/eversion range of motion than copers during the vertical drop. Copers exhibited less plantar flexion/dorsiflexion range of motion in the lateral and medial forefoot. Furthermore, the ankle instability and coper group exhibited less ankle plantar flexion at touch down. Additionally, the ankle instability group demonstrated a decreased plantar flexion/dorsiflexion range of motion at the ankle compared to the control group. Analysis of ground reaction forces showed a higher vertical peak and loading rate during the vertical drop in subjects with ankle instability. Interpretation: Subjects with chronic ankle instability displayed an altered, stiffer kinematic landing strategy and related alterations in landing kinetics, which might predispose them for episodes of giving way and actual ankle sprains.

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Dynamic Ankle Control in Athletes With Ankle Instability During Sports Maneuvers

Abstract: Sports training or rehabilitation programs should differentiate between the pre-landing and post-landing phases of sports maneuvers, and should educate athletes to land with an appropriate ankle position and muscle recruitment.

Cited by 81 publications

References 26 publications

Altered Vertical Ground Reaction Forces in Participants With Chronic Ankle Instability While Running

Altered Vertical Ground Reaction Forces in Participants With Chronic Ankle Instability While Running

The effect of dual tasking on foot kinematics in people with functional ankle instability

Multi-segment foot landing kinematics in subjects with chronic ankle instability

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