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Quality control of a novel clinical measurement of leg power in older adults: the AMTI force plate jump test

Winger, Mary (2014) Quality control of a novel clinical measurement of leg power in older adults: the AMTI force plate jump test. Master Essay, University of Pittsburgh.

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Abstract

Background/Objective: Emerging evidence suggests that muscle power (force times velocity) may be differentially or more strongly related than muscle strength (force alone) to motor performance, falling and disability in older adults. A novel leg power measure, the force plate jump test, was implemented into visit 4 of the Osteoporotic Fractures in Men Study (MrOS) to examine relationships to physical function and falls in older men. Methods: AMTI force plate data is being collected at 6 U.S. sites after 1 day central training and staff certification. Participants are instructed to complete 3–5 counter movement jumps. Each jump was rigorously evaluated by staff as either no protocol issues or data review flags (broken movement and/or failure to maintain a still position prior to “Go”) and/or participant safety flags (required stabilization from spotter, lost balance after landing, and/or pain during/after jump). Data for first 10 participants/site were intensively reviewed and feedback was provided to sites regarding incorrectly flagged jumps or testing issues (slow downward movement, failure to lift off the force plate during jump, recording started too early, stepped off of the force plate before recording ended, data not saved). Results: For the initial intensive review, staff recorded flags on 37.7% (87/231) of jumps. Of participants reviewed, 60% (36/60) had ≥1 jump with a staff-recorded flag, including 5.0% (4/60) reporting pain before/while/after jumping, 46.7% (28/60) with safety flags, and 40.0% (24/60) with data review flags. Examiners appropriately flagged failure to maintain a still position prior to jumping for 92.6% jumps and broken movement for 96.5% jumps. Testing issues occurred in 12.6% (29/231) of jumps. Force plate data from all participants and jumps were able to be analyzed. Peak power, velocity and force at peak power will be calculated with standardized programs. Conclusion: The intensive initial review provided vital feedback for refining testing, showed examiner accuracy/competency in testing, and demonstrated that high quality data is collected for analyses. This counter movement jump method is feasible for measuring leg power in a large multi-center epidemiological study of older men. These findings will have significant public health implications by relating leg power to functional abilities in our aging population.


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Details

Item Type: Other Thesis, Dissertation, or Long Paper (Master Essay)
Status: Unpublished
Creators/Authors:
CreatorsEmailPitt UsernameORCID
Winger, MaryMEW122@pitt.eduMEW122
Contributors:
ContributionContributors NameEmailPitt UsernameORCID
Committee ChairBoudreau, RobertBoudreauR@edc.pitt.eduROB21UNSPECIFIED
Committee MemberStrotmeyer, Elsastrotmeyere@ecd.pitt.eduUNSPECIFIEDUNSPECIFIED
Committee MemberSparto, Patrickpsparto@pitt.eduPSPARTOUNSPECIFIED
Date: 11 December 2014
Date Type: Publication
Access Restriction: No restriction; Release the ETD for access worldwide immediately.
Publisher: University of Pittsburgh
Institution: University of Pittsburgh
Schools and Programs: Graduate School of Public Health > Epidemiology
Degree: MPH - Master of Public Health
Thesis Type: Master Essay
Refereed: Yes
Date Deposited: 17 Aug 2015 17:58
Last Modified: 01 Sep 2020 14:00
URI: http://d-scholarship.pitt.edu/id/eprint/23650

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