Title
Study protocol, implementation, and verification of a short versatile upright exercise regime during 5 days of bed rest Study protocol, implementation, and verification of a short versatile upright exercise regime during 5 days of bed rest
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Subject
Human medicine
Source (journal)
The Journal of Musculoskeletal and Neuronal Interactions
Volume/pages
14(2014) :1 , p. 111-123
ISSN
1108-7161
ISI
000334579300012
Carrier
E
Target language
English (eng)
Affiliation
University of Antwerp
Abstract
Objectives: This work provides a reference for future papers originating from this study by providing basic results on body mass, urine volume, and hemodynamic changes to 5 days of bed rest (BR) and by describing acute cardio-respiratory/mechano-graphic responses to a short versatile upright exercise battery. Methods: Ten male subjects (mean +/- SEM age: 29.4 +/- 1.5 years; height: 178.8 +/- 1.5 cm; body mass: 77.7 +/- 1.5 kg) performed, in random order, 5 days of 6 head-down tilt (HDT) BR with no exercise (CON), or BR with daily 25 minutes of quiet upright standing (STA) or upright locomotion replacement training (LRT). Results: Plasma volume, exercise capacity and orthostatic tolerance decreased similarly between interventions following 5 days of BR. Upright heart rate during LRT and STA increased throughout BR; from 137 +/- 4 bpm to 146 +/- 4 bpm for LRT (P<0.01); and from 90 +/- 3 bpm to 102 +/- 6 bpm (P<0.001) for STA. Conclusion: the overall similarity in the response to BR, and increase in upright heart rate during the LRT sessions suggest early and advancing cardiovascular deconditioning during 5 days of BR bed rest, which was not prevented by the versatile exercise regime.
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