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Assessment of forces during side-posture adjustment with the use of a table-embedded force plate: Reference values for education

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Structural and chiropractic

J Chiropr Educ. 2023 Oct 1;37(2):73-81. doi: 10.7899/JCE-22-13.

Authors:

Brent S Russell, Edward F Owens Jr, Ronald S Hosek, Lydia L Dever, Michael T Weiner

Abstract.

Objective: Force-sensing treatment tables are becoming more commonly used by chiropractic educational institutions. However, when a table-embedded force platform is the sole measurement method, there is little information available about what force-time values instructors and students should expect for side-posture spinal manipulative thrusts. The purpose of this report is to provide force-time values recorded with such a system during side-posture manipulation with human recipients. Methods: Student volunteers were examined by and received lumbar or pelvic side-posture manipulation from experienced chiropractors who were diplomates of the Gonstead Clinical Studies Society. Forces were recorded using proprietary software of a Bertec force platform; force and time data were analyzed with a custom-programmed software tool in Excel. Results: Seven doctors of chiropractic performed 24 thrusts on 23 student recipients. Preload forces, averaging 69.7 N, and thrust loading duration, averaging 167 milliseconds, were similar to previous studies of side-posture manipulation. Peak loads were higher than previous studies, averaging 1010.9 N. Other variables included prethrust liftoff force, times from thrust onset to peak force and peak load to resolution of thrust, and average rates of force loading and unloading. Conclusion: The values we found will be used for reference at our institution and may be useful to instructors at other chiropractic educational institutions, in the teaching of lumbar side-posture manipulation. A caveat is that the values of this study reflect multiple sources of applied force, not solely the force applied directly to the spine. Keywords: Education; Force; Kinetics; Manipulation, Chiropractic; Manipulation, Spinal; Motor Skills.

Publication Date: 

2023 Oct

OEID: 

7137

Russell, SB., Jr, OFE., Hosek, SR., Dever, LL., Weiner, TM. (2023) 'Assessment of forces during side-posture adjustment with the use of a table-embedded force plate: Reference values for education', J Chiropr Educ. 2023 Oct 1;37(2):73-81. doi: 10.7899/JCE-22-13.

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