Key result
Prolonged bed rest is linked to an ~18% reduction in peak O2 uptake during exercise.
Why the study?
The study evaluated central and peripheral limitations to oxidative metabolism during exercise after prolonged bed rest in young males.
Does 35-day horizontal bed rest impair oxidative metabolism and oxygenation during exercise in young males?
Population
10 young males
Comparison
Before vs after 35-day horizontal bed rest
Design
Observational study with incremental and constant-load exercise tests
Follow-up
35 days
Authors
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Prolonged bed rest may impair exercise capacity in immobilized patients; leaves open mechanisms and countermeasures in clinical populations.
Observational (n=10)
Does 35-day horizontal bed rest impair oxidative metabolism and oxygenation during exercise in young males?
A 35-day bed rest significantly impairs skeletal muscle oxidative metabolism and cardiovascular oxygen delivery during exercise, without causing competition for oxygen between skeletal muscle and the brain.
Porcelli et al. (2010) reported an observational. 35-day horizontal bed rest vs. Before bed rest was evaluated on Peak workload, peak O2 uptake, peak stroke volume, peak cardiac output, and peak skeletal muscle O2 extraction. A 35-day horizontal bed rest decreased peak O2 uptake by 18%, peak cardiac output by 19%, and peak skeletal muscle O2 extraction by 33% during exercise.
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