Index to Chiropractic Literature
Index to Chiropractic Literature
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Monday, August 15, 2022
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ID 27007
  Title Effect of drop-piece high-velocity, low-amplitude manipulation to the midfoot of asymptomatic adult sprinters on performance during a unilateral horizontal drop-jump test: A feasibility investigation
Journal J Manipulative Physiol Ther. 2021 Sep;44(7):527-534
Peer Review Yes
Publication Type Article

Objective: The purpose of this study was to investigate the feasibility of measuring the immediate effects of drop-piece high-velocity, low-amplitude (DP-HVLA) manipulation to the midfoot region on jump distance in competitive adult sprinters during a standardized unilateral horizontal drop-jump (U-HDJ) test.

Methods: Seven asymptomatic competitive adult sprinters (4 women) were recruited for this study. Testing was conducted on the dominant leg. Participants completed a 10-minute self-selected warm-up, followed by a 6-jump familiarization period with the U-HDJ test. All participants completed 3 U-HDJ trials before and after receiving DP-HVLA chiropractic manipulation to the joints of the midfoot assessed as being hypomobile by a licensed sports chiropractor. The primary outcome of the U-HDJ test was horizontal displacement, measured using an optoelectronic motion-capture system. Mean, SD, and 95% confidence intervals were determined for the posttreatment change in jump distance. A single-sample t test with α = 0.05 assessed the posttreatment change in jumping distance.

Results: We were able to measure immediate effects. The preliminary findings showed an increase in jump distance after DP-HVLA manipulation to the midfoot region (mean = 0.06 m, SD = 0.05 m; P = .014; 95% confidence interval, 0.02-0.11; effect size = 1.30).

Conclusion: This study demonstrates that it was feasible to measure immediate improvement in performance after DP-HVLA chiropractic manipulation in a clinical assessment with correlation to sprinting performance in a population of elite sprinters. As this was a feasibility study, the small sample size, overlapping confidence intervals, and specific niche population limit the extrapolation of these findings.

Author keywords: Athletic Performance; Biomechanical Phenomena; Chiropractic; Foot; Running; Sports Medicine

Author affiliations: Division of Research and Innovation, Canadian Memorial Chiropractic College, Toronto, Ontario, Canada

This abstract is reproduced with the permission of the publisher; full text is available by subscription. Click on the above link and select a publisher from PubMed's LinkOut feature.


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