Effect of a Brief Heat Exposure on Blood Pressure and Physical Performance of Older Women Living in the Community—A Pilot-Study

Author: Anja Stotz; Kilian Rapp; Juha Oksa; Dawn A. Skelton; Nina Beyer; Jochen Klenk; Clemens Becker; Ulrich Lindemann
Language: English
Published: 2014
Source: Directory of Open Access Journals: DOAJ Articles
Online Access: http://www.mdpi.com/1660-4601/11/12/12623
https://doaj.org/toc/1660-4601
https://doi.org/10.3390/ijerph111212623
https://doaj.org/article/01b9c690f13649f29bcc9fd645c9b0be
Identification number: ftdoajarticles:oai:doaj.org/article:01b9c690f13649f29bcc9fd645c9b0be

Summary

Global climate change is affecting health and mortality, particularly in vulnerable populations. High ambient temperatures decrease blood pressure (BP) in young and middle aged adults and may lead to orthostatic hypotension, increasing the risk of falls in older adults. The aim of this study was to evaluate the feasibility of a test protocol to investigate BP response and aerobic capacity of older adults in a hot indoor environment. BP response and aerobic capacity were assessed in 26 community-dwelling older women (median age 75.5 years) at a room temperature of either 20 °C or 30 °C. The protocol was well tolerated by all participants. In the 30 °C condition systolic and diastolic BP (median difference 10 and 8 mmHg, respectively) and distance walked in 6 min (median difference 29.3 m) were lower than in the 20 °C condition (all p < 0.01). Systolic BP decreased after standing up from a lying position in the 30 °C (17.4 mmHg) and 20 °C (14.2 mmHg) condition (both p < 0.001). In conclusion, the protocol is feasible in this cohort and should be repeated in older adults with poor physical performance and impaired cardio-vascular response mechanisms. Furthermore, aerobic capacity was reduced after exposure to hot environmental temperatures, which should be considered when recommending exercise to older people during the summer months.