Validity of various portable devices to measure sit-to-stand velocity and power in older adults

•The LPT and iPhone App are valid tools for measuring STS velocity and power.•STS velocity recorded by the LPT and App correlates with physical function.•Clinicians can use STS velocity as a proxy for functional status in older adults. Movement velocity and power in a single STS are related to funct...

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Bibliographic Details
Published in:Gait & posture 2020-02, Vol.76, p.409-414
Main Authors: Orange, Samuel T., Metcalfe, James W., Liefeith, Andreas, Jordan, Alastair R.
Format: Article
Language:English
Subjects:
Functional screening
Older adults
Physical function
Power
Validity
Velocity
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Summary:•The LPT and iPhone App are valid tools for measuring STS velocity and power.•STS velocity recorded by the LPT and App correlates with physical function.•Clinicians can use STS velocity as a proxy for functional status in older adults. Movement velocity and power in a single STS are related to functional performance in older adults. Identifying accessible tools that provide valid measures of STS velocity/power would allow practitioners to evaluate physical function in clinical settings where time, space and finances are limited. Does a linear position transducer (LPT), iPhone application (App), and inertial measurement unit (IMU) obtain valid measurements of velocity and power during a single STS compared with 3D motion capture? Twenty-seven community-dwelling older adults aged ≥60 years completed a single STS test with mean velocity and power simultaneously measured with 3D motion capture, an LPT, IMU and App. Acceptable validity was established if the Pearson correlation coefficient (r) was very high (≥0.7) and bias as a standardised effect size (ES) was small (
ISSN:0966-6362
1879-2219
DOI:10.1016/j.gaitpost.2019.12.003