Temperature and Respiratory Responses in Exercise

Publisher Website
Google Scholar
Abstract
During electrically induced exercise of the hind legs of barbitalized dogs, working muscle temperature rose from an average control level of 36.9[degree]C to an average steady state level of 38.5[degree]C within 8-12 minutes after the initiation of exercise. Within about the same interval of time, rates of O2 consumption and pulmonary ventilation attained average steady state values 91% and 118% above their respective control levels. Temperatures measured simultaneously in the rectum, carotid artery, and skin overlying the working muscle did not attain steady levels during the 20 minute exercise period. O2 consumption, pulmonary ventilation and working muscle temperature were positively correlated with one another at various work intensities. Diathermy heating of the resting limbs of barbitalized dogs to levels averaging 42.2[degree]C induced marked hyperventilation. Selective heating of leg muscles to levels averaging 40.1[degree]C, however, induced no significant change in rate of pulmonary ventilation. No evidence was found to indicate participation of muscle thermoreceptors in the regulation of exercise hyperpnea.

This publication has 3 references indexed in Scilit: