Published in Experimental Physiology this research sought to simultaneously assess leg and respiratory muscle blood flow during intense exercise while manipulating the work of breathing (WOB).
Researchers from Canada & Brazil hypothesised:
- Increasing the work of breathing would increase respiratory muscle blood flow and decrease leg blood flow.
- Decreasing the work of breathing would decrease respiratory muscle blood flow and increase leg blood flow.
The work of breathing (WOB)
Changes in work of breathing are significantly and positively related to changes in respiratory muscle blood flow. By which it shows that increasing the work of breathing increases blood flow.
On the other hand, changes in work of breathing are inversely related to changes in locomotor blood flow. So decreasing the work of breathing increases locomotor blood flow.
Therefore findings from the study support the concept that respiratory muscle work significantly influences the distribution of blood flow to both respiratory and locomotor muscles.