Autonomic nervous system and postural control regulation during orthostatic test as putative markers of physical resilience among community-dwelling older adults
Koivunen, K., Löppönen, A., Palmberg, L., Rantalainen, T., Rantanen, T., & Karavirta, L. (2023). Autonomic nervous system and postural control regulation during orthostatic test as putative markers of physical resilience among community-dwelling older adults. Experimental Gerontology, 182, Article 112292. https://doi.org/10.1016/j.exger.2023.112292
Published in
Experimental GerontologyAuthors
Date
2023Discipline
BiomekaniikkaGerontologia ja kansanterveysHyvinvoinnin tutkimuksen yhteisöBiomechanicsGerontology and Public HealthSchool of WellbeingCopyright
© 2023 The Authors. Published by Elsevier Inc.
Introduction
We examined whether autonomic nervous system (ANS) and postural control regulation during orthostatic test reflect physical resilience by studying their associations with maximal walking speed and mortality.
Methods
The participants were community-dwelling Finnish men (n = 303) and women (n = 386) aged 75, 80, and 85 years at baseline. Systolic and diastolic blood pressure (BP), heart rate, heart rate variability (HRV), respiratory rate, and postural sway were obtained using a digital sphygmomanometer, a single-channel ECG, and thigh- and chest-worn accelerometers. Linear and Cox regression models were used to estimate the associations of the physiological indices with maximal 10-m walking speed and 5-year mortality separately for sexes.
Results
Better maintenance of BP under orthostatic stress was associated with faster walking speed in women and lower mortality hazard in men. Greater HRV in terms of low frequency power and lower respiration rate in supine position and smaller orthostatic changes in these were associated with faster walking speed especially in women. Less postural sway after standing up was associated with faster walking speed in women (−0.057, SE 0.022, p = 0.011) and more postural sway with increased mortality hazard in men (HR 1.71, 95 % CI 1.20–2.43) even after controlling for BP responses.
Conclusions
In addition to ANS regulation at rest and under stress, adaptation of postural control system to orthostasis may be used in quantifying older adults' physical resilience. Wearable sensors capturing stimulus-response patterns and natural fluctuations of body functions may provide opportunities to monitor and incorporate different subsystems' resilience also in free-living conditions.
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Publisher
ElsevierISSN Search the Publication Forum
0531-5565Keywords
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https://converis.jyu.fi/converis/portal/detail/Publication/188925071
Metadata
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- Liikuntatieteiden tiedekunta [3064]
Related funder(s)
Research Council of Finland; European CommissionFunding program(s)
Research costs of Academy Research Fellow, AoF; ERC European Research Council, H2020; Academy Research Fellow, AoF; Academy Project, AoF
The content of the publication reflects only the author’s view. The funder is not responsible for any use that may be made of the information it contains.
Additional information about funding
This work was supported by the JYU.Well - School of Wellbeing of the University of Jyväskylä (K.K.); the Academy of Finland (grant numbers 339391 and 346462 to L.K., 321336, 328818, and 352653 to Ti.R, and 310526 to Ta.R.), and European Research Council (grant number ERC AdvG 693045 to Ta.R.).License
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