A Comparison of Strength, ROM, Laxity, and Static and Dynamic Postural Control Between Ankle Copers and Patients With Chronic Ankle Instability
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| Language: | English |
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University of Toledo / OhioLINK
2013
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| Online Access: | http://rave.ohiolink.edu/etdc/view?acc_num=toledo1364550925 |
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ndltd-OhioLink-oai-etd.ohiolink.edu-toledo1364550925 |
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| record_format |
oai_dc |
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NDLTD |
| language |
English |
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NDLTD |
| topic |
Kinesiology |
| spellingShingle |
Kinesiology Boley, Heather A. A Comparison of Strength, ROM, Laxity, and Static and Dynamic Postural Control Between Ankle Copers and Patients With Chronic Ankle Instability |
| author |
Boley, Heather A. |
| author_facet |
Boley, Heather A. |
| author_sort |
Boley, Heather A. |
| title |
A Comparison of Strength, ROM, Laxity, and Static and Dynamic Postural Control Between Ankle Copers and Patients With Chronic Ankle Instability |
| title_short |
A Comparison of Strength, ROM, Laxity, and Static and Dynamic Postural Control Between Ankle Copers and Patients With Chronic Ankle Instability |
| title_full |
A Comparison of Strength, ROM, Laxity, and Static and Dynamic Postural Control Between Ankle Copers and Patients With Chronic Ankle Instability |
| title_fullStr |
A Comparison of Strength, ROM, Laxity, and Static and Dynamic Postural Control Between Ankle Copers and Patients With Chronic Ankle Instability |
| title_full_unstemmed |
A Comparison of Strength, ROM, Laxity, and Static and Dynamic Postural Control Between Ankle Copers and Patients With Chronic Ankle Instability |
| title_sort |
comparison of strength, rom, laxity, and static and dynamic postural control between ankle copers and patients with chronic ankle instability |
| publisher |
University of Toledo / OhioLINK |
| publishDate |
2013 |
| url |
http://rave.ohiolink.edu/etdc/view?acc_num=toledo1364550925 |
| work_keys_str_mv |
AT boleyheathera acomparisonofstrengthromlaxityandstaticanddynamicposturalcontrolbetweenanklecopersandpatientswithchronicankleinstability AT boleyheathera comparisonofstrengthromlaxityandstaticanddynamicposturalcontrolbetweenanklecopersandpatientswithchronicankleinstability |
| _version_ |
1719418849729708032 |
| spelling |
ndltd-OhioLink-oai-etd.ohiolink.edu-toledo13645509252021-08-03T05:21:28Z A Comparison of Strength, ROM, Laxity, and Static and Dynamic Postural Control Between Ankle Copers and Patients With Chronic Ankle Instability Boley, Heather A. Kinesiology Objective: The purpose of this study was to examine differences between ankle sprain copers and those with CAI in selected measures that are known to differentiate CAI and healthy individuals. Increased ankle laxity and diminished strength, ankle range of motion (ROM), and static and dynamic postural control have consistently characterized persons with CAI. The second purpose of this study was to determine which measures best predict SEBT performance in copers, and to determine if these measures differed from those that predict SEBT performance in those with CAI. Design: Case-control study with single blinding of the investigator. Participants: Forty-two participants between 18 and 30 years of age were recruited from the University of Toledo community. These participants were placed into either the CAI or coper group based on specific inclusion criteria. Methods: Participants completed the FAAM, FAAM-sport, AII, and a health history questionnaire before entering the lab for testing. The single, randomized testing session included ankle laxity testing, ankle and knee strength measurements, performance of static balance, the weight-bearing lunge test to estimate dorsiflexion ROM, and the SEBT as a measure of dynamic postural control. Main Outcome Measures: Ankle laxity was reported for the A-P direction (mm) and the I-E directions (°). Strength was reported as average peak torque, normalized to the participant’s body mass (N•m-1•kg-1). COPV was reported for the A/P and M/L directions, and TTB measures were reported in seconds (s). The maximum distance achieved during the WBLT was reported in centimeters (cm). Three trials of reach direction of the SEBT (cm), as well as a composite score, were reported as a percentage of limb length (cm) of the participant (%MAXD). Statistical Analysis: Group means and standard deviations of the SEBT trials, laxity measurements, COPV measures, and strength assessments were used for analysis, while the maximum value from the WBLT was used. The mean of the three static balance trials with eyes closed was calculated for each TTB measure. Individual t-tests were performed for each of the dependent variables in order to detect differences between the CAI and ankle coper groups. Effect sizes (Cohen’s d) with 95% confidence intervals were calculated. Two separate linear backward regression analyses were performed in order to determine which measures predict SEBT performance in copers and CAI participants. Significance was set a priori at P<.05. Results: Significant group differences were observed only for the number of failed trials during static balance in the eyes closed condition (p=.037). The CAI group had more failed trials than the coper group (CAI=4.88±4.11; coper=2.41±3.29). Moderate effect sizes were identified for all SEBT measures, COPV M/L with eyes closed, TTB A/P and M/L S.D. of the minima, and ankle dorsiflexion strength. The WBLT was able to significantly predict 34% of the variance in both the CAI and coper groups’ performance on the anterior reach of the SEBT. Plantar flexion strength and WBLT best predicted the CAI group’s performance on the PM and PL reaches, as well as the composite score. Knee flexion strength best predicted coper’s performance on the PM reach and the composite score. Static balance measures best predicted the coper group’s performance on the PL reach. Conclusion: Participants with CAI demonstrated decreased dynamic and static postural control compared to copers. These outcome measures appear to differentiate CAI patients and copers. Furthermore, we observed that copers exhibited increased variability compared to the CAI group when performing the SEBT. Future research should identify the mechanism by which copers are able to retain these higher levels of postural control and variability compared to patients with CAI. 2013-08-22 English text University of Toledo / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=toledo1364550925 http://rave.ohiolink.edu/etdc/view?acc_num=toledo1364550925 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws. |