Key result
Maximal exercise increases respiratory muscle blood flow, demanding ~15% of total cardiac output.
Why the study?
The extent of blood flow in inspiratory and expiratory muscles and their cardiac output proportion during rest and maximal exertion in ponies was not well characterized.
Does maximal exertion increase respiratory muscle blood flow and the proportion of cardiac output perfusing them in healthy ponies compared to rest?
Does maximal exertion increase respiratory muscle blood flow and the proportion of cardiac output perfusing them in healthy ponies compared to rest?
p-value: p=<0.0001
Maximal exercise in ponies significantly increases blood flow to respiratory muscles, which collectively receive nearly 15% of cardiac output during exertion.
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Pony data on respiratory muscle perfusion during maximal exercise should not guide human practice; leaves open translation to clinical cardiopulmonary physiology.
Murli Manohar (1990) studied healthy ponies (n=7). Maximal exercise vs. Rest was evaluated on blood flow in respiratory muscles (p=<0.0001). Maximal exercise significantly increased blood flow in all respiratory muscles (P<0.0001), with these muscles collectively receiving 14.8% of cardiac output during exertion.
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