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Regular exercise counteracts circadian shifts in core body temperature during long-duration bed rest

Mendt, Stefan, Gunga, Hanns-Christian, Felsenberg, Dieter, Belavy, Daniel L, Steinach, Mathias and Stahn, Alexander C 2021, Regular exercise counteracts circadian shifts in core body temperature during long-duration bed rest, npj microgravity, vol. 7, no. 1, pp. 1-6, doi: 10.1038/s41526-020-00129-1.

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Title Regular exercise counteracts circadian shifts in core body temperature during long-duration bed rest
Author(s) Mendt, Stefan
Gunga, Hanns-Christian
Felsenberg, Dieter
Belavy, Daniel LORCID iD for Belavy, Daniel L orcid.org/0000-0002-9307-832X
Steinach, Mathias
Stahn, Alexander C
Journal name npj microgravity
Volume number 7
Issue number 1
Article ID 1
Start page 1
End page 6
Total pages 6
Publisher Nature Publishing Group
Place of publication New York, N.Y.
Publication date 2021
ISSN 2373-8065
2373-8065
Keyword(s) Science & Technology
Multidisciplinary Sciences
neuroscience
physiology
Summary With NASA’s plans for the human exploration of Mars, astronauts will be exposed to mission durations much longer than current spaceflight missions on the International Space Station. These mission durations will increase the risk for circadian misalignment. Exercise has gained increasing interest as a non-pharmacological aid to entrain the circadian system. To assess the potential of exercise as a countermeasure to mitigate the risk for circadian disorders during spaceflight, we investigated the effects of long-term head-down tilt bed rest (HDBR) with and without exercise on the circadian rhythm of core body temperature. Core body temperature was recorded for 24 h using a rectal probe in sixteen healthy men (age: 30.5 ± 7.5 years (mean ± SD)) after 7 days and 49 days of HDBR. Five participants underwent HDBR only (CTR), five participants underwent HDBR and performed resistive exercises (RE), and six participants underwent HDBR and performed resistive exercises superimposed with vibrations (RVE). The exercise was scheduled three times per week. CTR showed a phase delay of 0.69 h. In contrast, both exercise groups were characterized by a phase advance (0.45 h for RE and 0.45 h for RVE; p = 0.026 for interaction between time and group). These findings suggest that resistive exercise (with or without vibration) may also serve as a countermeasure during spaceflight to mitigate circadian misalignments. The results could also be important for increasing awareness about the role of circadian disorders in long-term bedridden patients.
Language eng
DOI 10.1038/s41526-020-00129-1
Indigenous content off
HERDC Research category C1 Refereed article in a scholarly journal
Free to Read? Yes
Persistent URL http://hdl.handle.net/10536/DRO/DU:30146721

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Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au.