The effect of chiropractic manipulation on knee valgus during landing from a counter movement jump

Johnston, Gillian Elizabeth

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Johnston, Gillian Elizabeth. The effect of chiropractic manipulation on knee valgus during landing from a counter movement jump. 2016.

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Please use this identifier to cite or link to this item: http://hdl.handle.net/10210/90963

Title: The effect of chiropractic manipulation on knee valgus during landing from a counter movement jump
Creator: Johnston, Gillian Elizabeth
Contributor: Bester, C., Dr.
Contributor: Bester, C., Dr.
Subject: Knee - Wounds and injuries - Chiropractic treatment
Subject: Sports injuries - Chiropractic treatment
Date: 2016
Description: Abstract: Purpose: The aim of this study was to determine if chiropractic manipulation had an effect on knee valgus during the landing of a counter movement jump (CMJ) in female athletes. It also aimed to determine any biomechanical advantage obtained as a result of the chiropractic manipulation that would enable the female athlete to improve the height and hence overall performance of the CMJ. Methods: Thirty female participants between the ages of 18 and 35 years old who participated in sports that involved jumping were divided into 2 groups. Each participant performed 3 CMJs, which were recorded by a video camera, and the height of the CMJ was measured. Group 1 was motion palpated for lumbosacral restrictions and manipulated accordingly, whereas Group 2 had a 5 minute rest period. After intervention, the participants performed 3 more CMJs that were again recorded and measured. Dartfish software was used to measure the angle of knee valgus on the video footage. Participants were treated once a week for 4 weeks. Results: Knee valgus angles – With regard to the immediate effect of the interventions, Group 1 clinically displayed a larger decrease in knee valgus angle than Group 2. Statistically in Group 1, visit 1 (left knee) and visit 4 (right knee) displayed a significant decrease (P≤0.05). In terms of the medium term effect, Group 1’s decrease in knee valgus angle was clinically and statistically significant (P=0.036 (left knee); P=0.038 (right knee)). CMJ height – In the immediate term, Group 1 displayed a clinically and statistically significant increase in CMJ height at all 4 visits (P<0.05). In the medium term, Group 1 again displayed an increase that was both clinically and statictically relevant (P=0.000), whereas Group 2 had an overall decrease in CMJ height in the medium term. Conclusion: This study has shown that chiropractic manipulation may aid in decreasing knee valgus angles, therefore this may reduce the risk of female athletes sustaining excessive knee valgus related injuries. Chiropractic manipulation also caused the CMJ height to increase, therefore possibly improving the overall CMJ performance, which may provide the female athlete with a competitive advantage.
Description: M.Tech. (Chiropractic)

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collection(s): ETDs
Identifier: http://hdl.handle.net/10210/90963
Identifier: uj:20045
Identifier: uj:20045
Language: English
Rights: University of Johannesburg
Type: Masters (Thesis)
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ETDs The effect of chiropractic manipulation on knee valgus during landing from a counter movement jump

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