Abstract
Background
Fatigability of older adults is relevant with regard to physical performance, falls and physical activity. Objective and inexpensive assessment tools for testing fatigability in the persons’ home environment are not available.
Aims
The aim of this study was to develop a protocol to objectively measure fatigability during repeated sit-to-stand performance in older persons.
Methods
Decrease of maximum velocity of performance during repeated sit-to-stand transfers and the number of repetition when achieving a 10, 15, and 20 % fatigue threshold were measured in 49 community-dwelling older women using a linear encoder.
Results
Mean maximum velocity of the sit-to-stand performance was 1.12 m/s (SD 0.17 m/s) with an estimated change of velocity per repetition of −0.0037 m/s (95 % CI −0.0039 to −0.0035) during the test. The mean number of repetitions representing 10, 15, and 20 % fatigue threshold was 8.1, 13.8, and 21, respectively.
Discussion
This simple test protocol provides objective information about the decrease of performance of a daily task in older adults.
Conclusion
Fatigability of the sit-to-stand performance can be measured objectively by measuring the decrease of maximum velocity of consecutive repetitions and the repetition number achieving a 20 % fatigue threshold.
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Acknowledgments
The authors thank Aileen Currie for proof-reading the manuscript and declare that they have no conflict of interest. The study was funded by the German Research Council (BE 2338/2-1). The funding bodies had no role in study design; collection, analysis, or interpretation of data; in the writing of the manuscript; or in the decision to submit the manuscript for publication.
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On behalf of all authors, the corresponding author states that there is no conflict of interest.
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Written informed consent was obtained from all individual participant included in the study prior to data collection.
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All procedures performed in this study involving human participants were in accordance with the standards of the ethic committee of the local university and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
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Lindemann, U., Klenk, J. & Becker, C. Assessment of fatigability of older women during sit-to-stand performance. Aging Clin Exp Res 28, 889–893 (2016). https://doi.org/10.1007/s40520-015-0495-0
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DOI: https://doi.org/10.1007/s40520-015-0495-0