The Effect of External Cuff Pressure on Initial Exercise Hyperpnea

Abstract

The purpose of this study was to investigate the effect of an increase in intramuscular pressure on ventilatory response at the onset of exercise. Seven subjects participated in this study. We measured ventilatory responses to a 20-s singlearm extension-flexion exercise and passive movement. Each subject performed two kinds of exercise and passive movement in random order: in one, the exercising arm was encircled with a deflated cuff placed around the upper arm; in the other, the exercising arm was compressed by a cuff placed around the upper arm, which was inflated to 25 mmHg. We found that neither ventilatory response during exercise nor during passive movement was significantly changed even though the cuff compressed the arm. In conclusion, the increased intramuscular pressure caused by the 25-mmHg pressure of the cuff did not have a significant influence on ventilatory response at the onset of exercise.

Mechanism and implications of hyperpnea exaggeration at the onset of exercise in mechanical hyperalgesia after eccentric exercise

“…Phase I ventilatory response was previously revealed to be unchanged even though IMP in the exercising or moving limb was increased by 25 mmHg of an inflated cuff, in a normal condition 39) . Two studies have revealed that IMP in the resting state increased to approximately 6 mmHg at D2 37,38) , and two other studies have revealed that pressure from the outside approximately reflects IMP in muscle 40,41) .…”