1. Study protocol, implementation, and verification of a short versatile upright exercise regime during 5 days of bed rest.
- Author
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Mulder E, Frings-Meuthen P, von der Wiesche M, Clément G, Linnarsson D, Paloski WH, Wuyts FL, Zange J, and Rittweger J
- Subjects
- Adult, Cross-Over Studies, Humans, Male, Bed Rest adverse effects, Cardiovascular Deconditioning, Exercise physiology, Head-Down Tilt adverse effects, Weightlessness Simulation adverse effects
- 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/mechanographic 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.
- Published
- 2014