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Open AccessArticle

The Automatic Assessment of Strength and Mobility in Older Adults: A Test-Retest Reliability Study

1
Faculty of Sport Science, University of Extremadura, 10003 Cáceres, Spain
2
Facultad de Educación, Universidad Autónoma de Chile, Talca 1670, Chile
3
Departamento de Desporto e Saúde, Escola de Ciências e Tecnologia, Universidade de Évora, 7000-727 Évora, Portugal
4
Comprehensive Health Research Centre (CHRC), University of Évora, 7000-727 Évora, Portugal
*
Author to whom correspondence should be addressed.
Medicina 2019, 55(6), 270; https://doi.org/10.3390/medicina55060270
Received: 29 April 2019 / Revised: 2 June 2019 / Accepted: 4 June 2019 / Published: 11 June 2019
Background: Simple field tests such as the Timed Up and Go test (TUG) and 30 s Chair Stand test are commonly used to evaluate physical function in the elderly, providing crude outcome measures. Using an automatic chronometer, it is possible to obtain additional kinematic parameters that may lead to obtaining extra information and drawing further conclusions. However, there is a lack of studies that evaluate the test-retest reliability of these parameters, which may help to judge and interpret changes caused by an intervention or differences between populations. Thus, the aim of this study was to evaluate the test-retest reliability of the Timed Up and Go test (TUG) and 30 s Chair Stand test in healthy older adults. Methods: A total of 99 healthy older adults participated in this cross-sectional study. The TUG and the 30 s Chair Stand test were performed five times and twice, respectively, using an automatic chronometer. The sit-to-stand-to-sit cycle from the 30 s Chair Stand test was divided into two phases. Results: Overall, reliability for the 30 s Chair Stand test was good for almost each variable (intraclass correlation coefficient (ICC) >0.70). Furthermore, the use of an automatic chronometer improved the reliability for the TUG (ICC >0.86 for a manual chronometer and ICC >0.88 for an automatic chronometer). Conclusions: The TUG and the 30 s Chair Stand test are reliable in older adults. The use of an automatic chronometer in the TUG is strongly recommended as it increased the reliability of the test. This device enables researchers to obtain relevant and reliable data from the 30 s Chair Stand test, such as the duration of the sit-to-stand-to-sit cycles and phases. View Full-Text
Keywords: intraclass correlation coefficient; standard error of measurement; older adults; reliability analysis; physical fitness tests intraclass correlation coefficient; standard error of measurement; older adults; reliability analysis; physical fitness tests
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Collado-Mateo, D.; Madeira, P.; Dominguez-Muñoz, F.J.; Villafaina, S.; Tomas-Carus, P.; Parraca, J.A. The Automatic Assessment of Strength and Mobility in Older Adults: A Test-Retest Reliability Study. Medicina 2019, 55, 270.

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