1. Association of Sit-to-Stand Capacity and Free-Living Performance Using Thigh-Worn Accelerometers among 60- to 90-Yr-Old Adults.
- Author
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LÖPPÖNEN, ANTTI, DELECLUSE, CHRISTOPHE, SUORSA, KRISTIN, KARAVIRTA, LAURA, LESKINEN, TUIJA, MEULEMANS, LIEN, PORTEGIJS, ERJA, FINNI, TAIJA, RANTANEN, TAINA, STENHOLM, SARI, RANTALAINEN, TIMO, and VAN ROIE, EVELIEN
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ACCELEROMETERS - Abstract
Five times sit-to-stand (STS) test is commonly used as a clinical assessment of lower-extremity functional ability, but its association with free-living performance has not been studied. Therefore, we investigated the association between laboratory-based STS capacity and free-living STS performance using accelerometry. The results were stratified according to age and functional ability groups. Methods: This cross-sectional study included 497 participants (63% women) 60-90 yr old from three independent studies. A thigh-worn triaxial accelerometer was used to estimate angular velocity in maximal laboratory-based STS capacity and in free-living STS transitions over 3-7 d of continuous monitoring. Functional ability was assessed with short physical performance battery. Results: Laboratory-based STS capacity was moderately associated with the free-living mean and maximal STS performance (r = 0.52-0.65, P < 0.01). Angular velocity was lower in older compared with younger and in low- versus high-functioning groups, in both capacity and free-living STS variables (all P < 0.05). Overall, angular velocity was higher in capacity compared with free-living STS performance. The STS reserve (test capacity - free-living maximal performance) was larger in younger and in high-functioning groups compared with older and low-functioning groups (all P < 0.05). Conclusions: Laboratory-based STS capacity and free-living performance were found to be associated. However, capacity and performance are not interchangeable but rather provide complementary information. Older and low-functioning individuals seemed to perform free-living STS movements at a higher percentage of their maximal capacity compared with younger and high-functioning individuals. Therefore, we postulate that low capacity may limit free-living performance. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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