scholarly journals Discriminating Between Copers and People With Chronic Ankle Instability

2012 ◽  
Vol 47 (2) ◽  
pp. 136-142 ◽  
Author(s):  
Erik A. Wikstrom ◽  
Mark D. Tillman ◽  
Terese L. Chmielewski ◽  
James H. Cauraugh ◽  
Keith E. Naugle ◽  
...  
Keyword(s):  
Diagnostic Accuracy ◽  
Confidence Intervals ◽  
Outcome Measures ◽  
Sagittal Plane ◽  
Ankle Instability ◽  
Chronic Ankle Instability ◽  
Self Report ◽  
Causal Mechanism ◽  
Diagnostic Utility ◽  
Medicine Research

Context: Differences in various outcome measures have been identified between people who have sprained their ankles but have no residual symptoms (copers) and people with chronic ankle instability (CAI). However, the diagnostic utility of the reported outcome measures has rarely been determined. Identifying outcome measures capable of predicting who is less likely to develop CAI could improve rehabilitation protocols and increase the efficiency of these measures. Objective: To determine the diagnostic utility and cutoff scores of perceptual, mechanical, and sensorimotor outcome measures between copers and people with CAI by using receiver operating characteristic curves. Design: Case-control study. Setting: Sports medicine research laboratory. Patients or Other Participants: Twenty-four copers (12 men, 12 women; age = 20.8 ± 1.5 years, height = 173 ± 11 cm, mass = 78 ± 27 kg) and 24 people with CAI (12 men, 12 women; age = 21.7 ± 2.8 years, height = 175 ± 13 cm, mass = 71 ± 13 kg) participated. Intervention(s): Self-reported disability questionnaires, radiographic images, and a single-legged hop stabilization test. Main Outcome Measure(s): Perceptual outcomes included scores on the Foot and Ankle Disability Index (FADI), FADI-Sport, and a self-report questionnaire of ankle function. Mechanically, talar position was quantified by measuring the distance from the anterior tibia to the anterior talus in the sagittal plane. Sensorimotor outcomes were the dynamic postural stability index and directional indices, which were calculated during a single-legged hop stabilization task. Results: Perceptual outcomes demonstrated diagnostic accuracy (range, 0.79–0.91), with 95% confidence intervals ranging from 0.65 to 1.00. Sensorimotor outcomes also were able to discriminate between copers and people with CAI but with less accuracy (range, 0.69–0.70), with 95% confidence intervals ranging from 0.37 to 0.86. The mechanical outcome demonstrated poor diagnostic accuracy (0.52). Conclusions: The greatest diagnostic utility scores were achieved by the self-assessed disability questionnaires, which indicated that perceptual outcomes had the greatest ability to accurately predict people who became copers after their initial injuries. However, the diversity of outcome measures that discriminated between copers and people with CAI indicated that the causal mechanism of CAI is probably multifactorial.

scholarly journals Gait Kinematics After Taping in Participants With Chronic Ankle Instability

2014 ◽  
Vol 49 (3) ◽  
pp. 322-330 ◽  
Author(s):  
Lisa Chinn ◽  
Jay Dicharry ◽  
Joseph M. Hart ◽  
Susan Saliba ◽  
Robert Wilder ◽  
...  
Keyword(s):  
Confidence Intervals ◽  
Gait Cycle ◽  
Sagittal Plane ◽  
Ankle Instability ◽  
Knee Kinematics ◽  
Chronic Ankle Instability ◽  
Mean Difference ◽  
Ankle Sprains ◽  
Lateral Ankle ◽  
Gait Kinematics

Context: Chronic ankle instability is characterized by repetitive lateral ankle sprains. Prophylactic ankle taping is a common intervention used to reduce the risk of ankle sprains. However, little research has been conducted to evaluate the effect ankle taping has on gait kinematics. Objective: To investigate the effect of taping on ankle and knee kinematics during walking and jogging in participants with chronic ankle instability. Design: Controlled laboratory study. Setting: Motion analysis laboratory. Patients or Participants: A total of 15 individuals (8 men, 7 women; age = 26.9 ± 6.8 years, height = 171.7 ± 6.3 cm, mass = 73.5 ± 10.7 kg) with self-reported chronic ankle instability volunteered. They had an average of 5.3 ± 3.1 incidences of ankle sprain. Intervention(s): Participants walked and jogged in shoes on a treadmill while untaped and taped. The tape technique was a traditional preventive taping procedure. Conditions were randomized. Main Outcome Measure(s): Frontal-plane and sagittal-plane ankle and sagittal-plane knee kinematics were recorded throughout the entire gait cycle. Group means and 90% confidence intervals were calculated, plotted, and inspected for percentages of the gait cycle in which the confidence intervals did not overlap. Results: During walking, participants were less plantar flexed from 64% to 69% of the gait cycle (mean difference = 5.73° ± 0.54°) and less inverted from 51% to 61% (mean difference = 4.34° ± 0.65°) and 76% to 81% (mean difference = 5.55° ± 0.54°) of the gait cycle when taped. During jogging, participants were less dorsiflexed from 12% to 21% (mean difference = 4.91° ± 0.18°) and less inverted from 47% to 58% (mean difference = 6.52° ± 0.12°) of the gait cycle when taped. No sagittal-plane knee kinematic differences were found. Conclusions: In those with chronic ankle instability, taping resulted in a more neutral ankle position during walking and jogging in shoes on a treadmill. This change in foot positioning and the mechanical properties of the tape may explain the protective aspect of taping in preventing lateral ankle sprains.

scholarly journals Short-Term Effects of Balance Training with Stroboscopic Vision for Patients with Chronic Ankle Instability: A Single-Blinded Randomized Controlled Trial

2021 ◽  
Vol 18 (10) ◽  
pp. 5364
Author(s):  
Kyung-Min Kim ◽  
María D. Estudillo-Martínez ◽  
Yolanda Castellote-Caballero ◽  
Alejandro Estepa-Gallego ◽  
David Cruz-Díaz
Keyword(s):  
Randomized Controlled Trial ◽  
Outcome Measures ◽  
Ankle Instability ◽  
Controlled Trial ◽  
Balance Training ◽  
Chronic Ankle Instability ◽  
Balance Test ◽  
Training Groups ◽  
Randomized Controlled ◽  
Star Excursion Balance Test

Chronic Ankle Instability (CAI) is one of the most common musculoskeletal dysfunctions. Stroboscopic vision (SV) training has been deemed to enhance somatosensorial pathways in this population group; nevertheless, until recently no studies have addressed the additional effects of this treatment option to the traditional therapeutic approach. Methods: To evaluate the effectiveness of a partial visual deprivation training protocol in patients with CAI, a randomized controlled trial was carried out. Patients with CAI (n = 73) were randomized into either a balance training, SV training, or a control (no training) group. For participants assigned into training groups, they received 18 training sessions over 6 weeks. The primary outcome was dynamic balance as measured by the Star Excursion Balance Test assessed at baseline and after 6 weeks of intervention. Secondary outcome measures included ankle dorsiflexion range of motion, self-reported instability feeling, and ankle functional status. Results: Better scores in stroboscopic training and balance training groups in all outcome measures were observed in comparison with the control group with moderate to large effect sizes. Stroboscopic training was more effective than neuromuscular training in self-reported instability feeling (cohen’s d = 0.71; p = 0.042) and anterior reach distance of the star excursion balance test (cohen’s d = 1.23; p = 0.001). Conclusions: Preliminary findings from the effects of SV Stroboscopic training in patients with CAI, suggest that SV may be beneficial in CAI rehabilitation.

scholarly journals The Prevalence of Pain in People With Chronic Ankle Instability: A Systematic Review

2019 ◽  
Vol 54 (6) ◽  
pp. 662-670 ◽  
Author(s):  
Saeed Al Adal ◽  
Fereshteh Pourkazemi ◽  
Martin Mackey ◽  
Claire E. Hiller
Keyword(s):  
Physical Examination ◽  
Visual Analog Scale ◽  
Ankle Instability ◽  
Chronic Ankle Instability ◽  
Self Report ◽  
Functional Impairments ◽  
Ankle Pain ◽  
Analog Scale ◽  
Eligibility Criteria ◽  
Prevalence Of Pain

ObjectiveTo identify the prevalence of pain in people with chronic ankle instability (CAI) and how pain is related to the impairments of CAI.Data SourcesWe searched the databases of AMED, CINAHL, EMBASE, MEDLINE, PubMed, Scopus, SPORTDiscus, and Web of Science from inception to March 2017.Study SelectionEligible studies were peer-reviewed research in which investigators reported the presence of ankle pain or assessed the effects of pain on impairments in participants with CAI. Age and language were not restricted. Studies that included only surgical interventions were excluded.Data ExtractionStudies identified by the search strategy were screened according to the eligibility criteria, and 2 independent reviewers extracted the data. Outcome measurements were (1) pain ratings using measures such as a visual analog scale and (2) other residual impairments, such as feelings of weakness, giving way, or deficits in functional performance.Data SynthesisOf the 5907 records identified through the database search, 14 studies were included in this review. All authors assessed ankle pain by self-report questionnaires or physical examination, or both. Pain was self-reported by 23% to 79% of participants and present on physical examination in 25% to 75% of participants, depending on the test applied. Among these studies, the highest reported pain level was 4.9 on the 11-point visual analog scale. Studies were heterogeneous for pain measures, participant groups, interventions, and follow-up periods. The relationship between pain and the structural and functional impairments associated with CAI was not investigated in the included studies.ConclusionsPain was present in a large proportion of people who had CAI, but pain levels were low. Information about the effects of pain was not reported, so researchers should examine the association between pain and function, balance, or other activities in people with CAI.

The Effect of 2 Forms of Talocrural Joint Traction on Dorsiflexion Range of Motion and Postural Control in Those With Chronic Ankle Instability

2017 ◽  
Vol 26 (3) ◽  
pp. 239-244 ◽  
Author(s):  
Cameron J. Powden ◽  
Kathleen K. Hogan ◽  
Erik A. Wikstrom ◽  
Matthew C. Hoch
Keyword(s):  
Postural Control ◽  
Range Of Motion ◽  
Outcome Measures ◽  
Ankle Instability ◽  
Weight Bearing ◽  
Chronic Ankle Instability ◽  
Physical Contact ◽  
Future Research ◽  
Talocrural Joint ◽  
Sham Condition

Context:Talocrural joint mobilizations are commonly used to address deficits associated with chronic ankle instability (CAI).Objective:Examine the immediate effects of talocrural joint traction in those with CAI.Design:Blinded, crossover.Setting:Laboratory.Participants:Twenty adults (14 females; age = 23.80 ± 4.02 y; height = 169.55 ± 12.38 cm; weight = 78.34 ± 16.32 kg) with self-reported CAI participated. Inclusion criteria consisted of a history of ≥1 ankle sprain, ≥2 episodes of giving way in the previous 3 mo, answering “yes” to ≥4 questions on the Ankle Instability Instrument, and ≤24 on the Cumberland Ankle Instability Tool.Intervention:Subjects participated in 3 sessions in which they received a single treatment session of sustained traction (ST), oscillatory traction (OT), or a sham condition in a randomized order. Interventions consisted of four 30-s sets of traction with 1 min of rest between sets. During ST and OT, the talus was distracted distally from the ankle mortise to the end-range of accessory motion. ST consisted of continuous distraction and OT involved 1-s oscillations between the mid and end-range of accessory motion. The sham condition consisted of physical contact without force application. Preintervention and postintervention measurements of weight-bearing dorsiflexion, dynamic balance, and static single-limb balance were collected.Main Outcome Measures:The independent variable was treatment (ST, OT, sham). The dependent variables included pre-to-posttreatment change scores for the WBLT (cm), normalized SEBTAR (%), and time-to-boundary (TTB) variables(s). Separate 1-way ANOVAs examined differences between treatments for each dependent variable. Alpha was set a priori at P < .05.Results:No significant treatment effects were identified for any variables.Conclusion:A single intervention of ST or OT did not produce significant changes in weight-bearing dorsiflexion range of motion or postural control in individuals with CAI. Future research should investigate the effects of repeated talocrural traction treatments and the effects of this technique when combined with other manual therapies.

scholarly journals The Effects of Therapeutic Exercise With and Without Mobilization in Participants With Chronic Ankle Instability: A Randomized Controlled Trial

2020 ◽  
pp. 1-8
Author(s):  
Cameron Bolton ◽  
Sheri Hale ◽  
Todd Telemeco
Keyword(s):  
Randomized Controlled Trial ◽  
Outcome Measures ◽  
Ankle Instability ◽  
Controlled Trial ◽  
Chronic Ankle Instability ◽  
Therapeutic Exercise ◽  
Convenience Sample ◽  
Randomized Controlled ◽  
Hop Test

Context: Manual therapy (MT) is reported to increase range of motion (ROM), improve balance, and decrease pain in individuals with chronic ankle instability (CAI). Additional literature is needed to examine the effectiveness of the addition of MT to a therapeutic exercise regimen in individuals with CAI. Objective: To examine the combined effects of thrust joint manipulation (TJM) and exercise on function in participants reporting CAI. Design: Randomized controlled trial. Setting: Research laboratory. Participants: A convenience sample of 30 participants (mean age 23.7 [3.65] y; mean height 169.50 [9.50] cm; mean mass 66.48 [10.64] kg). Intervention: Participants were randomly allocated to the exercise (n = 15) or exercise + TJM group (n = 20) and completed an exercise program. The exercise + TJM group also received MT at the talocrural, proximal, and distal tibiofibular joints in the first 3 sessions. Main Outcome Measures: Self-reported outcomes were recorded at baseline and follow-up using the Foot and Ankle Ability Measure (FAAM), the FAAM-Sport (FAAM-S) subscale, and the Ankle Joint Functional Assessment Tool (AJFAT). The side-hop test, figure-of-8 hop test, 3 directions of the Star Excursion Balance Test, and dorsiflexion ROM were also assessed at baseline and follow-up. Results: Only the exercise + TJM group demonstrated an improvement in weight-bearing dorsiflexion with the knee flexed following treatment (P = .02). For all outcome measures, except ROM, subjects improved significantly at follow-up regardless of group assignment (P ≤ .01). Conclusions: Our data suggest that rehabilitation of patients with CAI is related to improved ROM, function, and self-reported outcomes. This provides evidence that the addition of MT to exercise may enhance improvements in ROM as compared with exercise alone. Additional research is needed to identify optimal parameters to maximize therapeutic benefit.

Altered Ankle Kinematics and Shank-Rear-Foot Coupling in Those with Chronic Ankle Instability

2009 ◽  
Vol 18 (3) ◽  
pp. 375-388 ◽  
Author(s):  
Lindsay K. Drewes ◽  
Patrick O. McKeon ◽  
Gabriele Paolini ◽  
Patrick Riley ◽  
D. Casey Kerrigan ◽  
...  
Keyword(s):  
Outcome Measures ◽  
Ankle Instability ◽  
External Rotation ◽  
Chronic Ankle Instability ◽  
Initial Contact ◽  
3 Dimensional ◽  
Joint Coupling ◽  
Ankle Inversion ◽  
Ankle Kinematics ◽  
Phase Angles

Context:Kinematic patterns during gait have not been extensively studied in relation to chronic ankle instability (CAI).Objective:To determine whether individuals with CAI demonstrate altered ankle kinematics and shank-rear-foot coupling compared with controls during walking and jogging.Design:Case control.Setting:Motion-analysis laboratory.Participants:7 participants (3 men, 4 women) suffering from CAI (age 24.6 ± 4.2 y, height 172.6 ± 9.4 cm, mass 70.9 ± 8.1 kg) and 7 (3 men, 4 women) healthy, matched controls (age 24.7 ± 4.5 y, height 168.2 ± 5.9 cm, mass 66.5 ± 9.8 kg).Interventions:Subjects walked and jogged on a treadmill while 3-dimensional kinematics of the lower extremities were captured.Main Outcome Measures:The positions of rear-foot inversion–eversion and shank rotation were calculated throughout the gait cycle. Continuous relative-phase angles between these segments were calculated to assess coupling.Results:The CAI group demonstrated more rear-foot inversion and shank external rotation during walking and jogging. There were differences between groups in shank-rear-foot coupling during terminal swing at both speeds.Conclusions:Altered ankle kinematics and joint coupling during the terminal-swing phase of gait may predispose a population with CAI to ankle-inversion injuries. Less coordinated movement during gait may be an indication of altered neuromuscular recruitment of the musculature surrounding the ankle as the foot is being positioned for initial contact.

scholarly journals A Randomized Controlled Trial Comparing Rehabilitation Efficacy in Chronic Ankle Instability

2017 ◽  
Vol 26 (4) ◽  
pp. 238-249 ◽  
Author(s):  
Cynthia J. Wright ◽  
Shelley W. Linens ◽  
Mary S. Cain
Keyword(s):  
Randomized Controlled Trial ◽  
Outcome Measures ◽  
Ankle Instability ◽  
Controlled Trial ◽  
Chronic Ankle Instability ◽  
Global Rating ◽  
Comparative Efficacy ◽  
Level Of Evidence ◽  
Randomized Controlled ◽  
Sf 36

Context:There is minimal patient-oriented evidence regarding the effectiveness of interventions targeted to reduce symptoms associated with chronic ankle instability (CAI). In addition, clinicians aiming to prioritize care by implementing only the most effective components of a rehabilitative program have very little evidence on comparative efficacy.Objective:To assess the comparative efficacy of 2 common ankle rehabilitation techniques (wobble-board [WB] balance training and ankle strengthening using resistance tubing [RT]) using patient-oriented outcomes.Design:Randomized controlled trial.Setting:Laboratory.Patients:40 patients with CAI randomized into 2 treatment groups: RT and WB. CAI inclusion criteria included a history of an ankle sprain, recurrent “giving way,” and a Cumberland Ankle Instability Tool (CAIT) score ≤25.Interventions:Participants completed 5 clinician-oriented tests (foot-lift test, time-in-balance, Star Excursion Balance Test, figure-of-8 hop, and side-hop) and 5 patient-oriented questionnaires (CAIT, Foot and Ankle Ability Measure [FAAM], Activities of Daily Living [ADL] and FAAM Sport scale, Short-Form 36 [SF-36], and Global Rating of Function [GRF]). After baseline testing, participants completed 12 sessions over 4 wk of graduated WB or RT exercise, then repeated baseline tests.Main Outcome Measures:For each patient- and clinician-oriented test, separate 2 × 2 RMANOVAs analyzed differences between groups over time (alpha set at P = .05).Results:There was a significant interaction between group and time for the FAAM-ADL (P = .04). Specifically, the WB group improved postintervention (P < .001) whereas the RT group remained the same (P = .29). There were no other significant interactions or significant differences between groups (all P > .05). There were significant improvements postintervention for the CAIT, FAAM-Sport, GRF, SF-36, and all 5 clinician-oriented tests (all P < .001).Conclusions:A single-exercise 4-wk intervention can improve patient- and clinician-oriented outcomes in individuals with CAI. Limited evidence indicates that WB training was more effective than RT.Level of Evidence:Therapy, level 1b.

scholarly journals Alterations in Neuromuscular Control at the Knee in Individuals With Chronic Ankle Instability

2014 ◽  
Vol 49 (5) ◽  
pp. 599-607 ◽  
Author(s):  
Masafumi Terada ◽  
Brian G. Pietrosimone ◽  
Phillip A. Gribble
Keyword(s):  
Confidence Interval ◽  
Effect Size ◽  
Muscle Activation ◽  
Sagittal Plane ◽  
Ankle Instability ◽  
Force Plate ◽  
Neuromuscular Control ◽  
Chronic Ankle Instability ◽  
Electromyographic Activity ◽  
Vastus Medialis

Context: Few authors have assessed neuromuscular knee-stabilization strategies in individuals with chronic ankle instability (CAI) during functional activities. Objective: To investigate the influence of CAI on neuromuscular characteristics around the knee during a stop-jump task. Design: Case-control study. Setting: Research laboratory. Participants or Other Participants: A total of 19 participants with self-reported unilateral CAI and 19 healthy control participants volunteered for this study. Intervention(s): Participants performed double-legged, vertical stop-jump tasks onto a force plate, and we measured muscle activation around the knee of each limb. Main Outcome Measure(s): We calculated the integrated electromyography for the vastus medialis oblique, vastus lateralis, medial hamstrings, and lateral hamstrings muscles during the 100 ms before and after initial foot contacts with the force plate and normalized by the ensemble peak electromyographic value. Knee sagittal-plane kinematics were also analyzed during a stop-jump task. Results: Compared with control participants, the CAI group demonstrated greater prelanding integrated electromyographic activity of the vastus medialis oblique (CAI = 52.28 ± 11.25%·ms, control = 43.90 ± 10.13%·ms, t36 = 2.41, P = .021, effect size = 0.78, 95% confidence interval = 0.11, 1.43) and less knee-flexion angle at the point of initial foot contact (CAI = 7.81° ± 8.27°, control = 14.09° ± 8.7°, t36 = −2.28, P = .029, effect size = −0.74, 95% confidence interval = −1.38, −0.07) and at 100 ms post–initial foot contact (CAI = 51.36° ± 5.29°, control = 58.66° ± 7.66°, t36 = −3.42, P = .002, effect size = −1.11, 95% confidence interval = −1.77, −0.40). No significant results were noted for the other electromyographic measures. Conclusions: We found altered feed-forward patterns of the vastus medialis oblique and altered postlanding knee sagittal-plane kinematics in the CAI group. These observations may provide insight regarding sensorimotor characteristics that may be associated with CAI.

scholarly journals Comparison of the Psychological Profile of Ankle Sprain Between Coper and Chronic Ankle Instability Individuals: Cross-sectional Study

2021 ◽  
Author(s):  
Shima Babakhanian ◽  
Mohammad Hani Mansori ◽  
Mohammad Karimizadeh Ardakani ◽  
Homa Naderifar
Keyword(s):  
Goal Setting ◽  
Sports Injuries ◽  
Ankle Instability ◽  
Chronic Ankle Instability ◽  
Mental Practice ◽  
Self Report ◽  
Mental Skills ◽  
Cross Sectional ◽  
Self Confidence ◽  
Significant Difference

Abstract Background: The aim of this study was to compare the psychological parameters in Coper individuals and people with chronic ankle instability (CAI).Methods: This study was a cross-sectional and comparative study. Sixty elite athletes, from multiple athletic disciplines, who have suffered from lateral ankle sprains at least once in the last two years, were selected as research subjects and were divided into two groups: Copers (n = 30) and CAI (n = 30). Classification of CAI, and coper groups were done by AJFAT, CAIT and FAAM self-report questionnaires. Athletes' psychological characteristics were measured using the Ottawa Mental Skills Assessment Tool (OMSAT-3). Multivariate analysis of variance (MANOVA) and independent t-test were used to evaluate the differences between groups at a significance level of 0.05. Results: The results showed there was a significant difference between the two groups in Goal setting, Self-confidence, Commitment, Relaxation, Fear control and Coping with stress, Focusing, Refocusing, and Mental practice (P <0.05). And Coper athletes scored higher than ankle instability athletes. But there were no significant differences between the two groups in the following parameters: Inactivation, Imagery, and Competition planning skills (P <0.05).Conclusion: The findings showed that athletes with CAI scored lower than Coper athletes on psychological exams. Given the importance of prioritizing the mental components of goal setting, imagery, relaxation, activation, and self-confidence, the design of the competition should be a priority for rehabilitation. Therefore, coaches and sports experts are recommended to focus and improve mental skills in athletes who suffer from sports injuries, to reduce the occurrence of repetitive sports injuries.

Knee Flexion Angle at Initial Contact During Jump Landing in Individuals With and Without Chronic Ankle Instability: A Critically-Appraised Topic

2019 ◽  
Vol 24 (4) ◽  
pp. 151-155
Author(s):  
Jacob T. Hartzell ◽  
Kyle B. Kosik ◽  
Matthew C. Hoch ◽  
Phillip A. Gribble
Keyword(s):  
Knee Flexion ◽  
Sagittal Plane ◽  
Ankle Instability ◽  
Knee Kinematics ◽  
Chronic Ankle Instability ◽  
Flexion Angle ◽  
Initial Contact ◽  
Knee Flexion Angle ◽  
Bottom Line ◽  
Jump Landing

Clinical Scenario: Chronic ankle instability (CAI) is characterized by the residual symptoms and feelings of instability that persist after an acute ankle sprain. Current literature has identified several neuromuscular impairments associated with CAI that may negatively impact sagittal plane knee kinematics during dynamic activities. This has led researchers to begin examining sagittal plane knee kinematics during jump landing tasks. Understanding changes in movement patterns at the knee may assist clinicians in designing rehabilitation plans that target both the ankle and more proximal joints, such as the knee. Clinical Question: What is the evidence to support the notion that patients with CAI have decreased sagittal plane knee flexion angle at initial contact during a jump-landing task compared to healthy individuals? Summary of Key Findings: The literature was systematically searched for level 4 evidence or higher. The search yielded two case-control studies which met the inclusion criteria. Based on limited evidence, there are mixed results for whether sagittal plane knee kinematic at initial contact differ between those with and without CAI. Clinical Bottom Line: There is weak evidence to support changes in sagittal plane knee kinematics at initial contact during a jump landing in individuals with CAI compared to healthy controls. Strength of Recommendation: In accordance with the Centre for Evidence-Based Medicine, a grade of C for level 4 evidence is recommended due to variable findings.

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