Circulating microRNAs Correlated with Bone Loss Induced by 45 Days of Bed Rest

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Circulating microRNAs Correlated with Bone Loss Induced by 45 Days of Bed Rest

The purpose of this study was to find the circulating microRNAs (miRNAs) co-related with bone loss induced by bed rest, and testify whether the selected miRNAs could reflect the bone mineral status of human after bed-rest. We analyzed plasma miRNA levels of 16 subjects after 45 days of -6° head-down tilt bed rest, which is a reliable model for the simulation of microgravity. We characterize the...

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Prevention of bone loss during 56 days of strict bed rest by side-alternating resistive vibration exercise.

Bed rest is a recognized model for muscle atrophy and bone loss in space flight and in clinical medicine. We hypothesized that whole body vibration in combination with resistive exercise (RVE) would be an effective countermeasure. Twenty healthy male volunteers underwent horizontal bed rest for 56 days and were randomly assigned either to a group that performed RVE 11 times per week or to a gro...

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Exercise-induced pyruvate dehydrogenase activation is not affected by 7 days of bed rest.

To test the hypothesis that physical inactivity impairs the exercise-induced modulation of pyruvate dehydrogenase (PDH), six healthy normally physically active male subjects completed 7 days of bed rest. Before and immediately after the bed rest, the subjects completed an oral glucose tolerance test (OGTT) and a one-legged knee extensor exercise bout [45 min at 60% maximal load (W(max))] with m...

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Changes in the sympathetic nervous system induced by 42 days of head-down bed rest.

Changes in autonomic nervous system activity could be linked to the orthostatic intolerance (OI) that individuals suffer after a spaceflight or head-down bed rest (HDBR). We examined this possibility by assessing the sympathetic nervous system activity during 42 days of HDBR in seven healthy men. Heart rate variability was studied with the use of power spectral analysis, which provided indicato...

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Markers of bone metabolism during 14 days of bed rest in young and older men

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ژورنال

عنوان ژورنال: Frontiers in Physiology

سال: 2017

ISSN: 1664-042X

DOI: 10.3389/fphys.2017.00069