The examination of the cardiovascular reactions of persons has become a conventional method of estimating something of their physical fitness. In the clinic the same principles have been applied to determine, for patients with circulatory deficiencies, the extent to which various forms of physical exercise may be warranted; likewise the improvement or the reverse that may attend the progress and treatment of the disorder. In the tests proposed by Schneider4 of Wesleyan University the data employed are the pulse rates during recumbency and standing, the increase in the frequency of the heart beat when the standing and reclining postures are compared, the acceleration of the pulse rate by a standard exercise, the time required for the pulse rate to return to normal after the exercise, and the change int the systolic arterial blood pressure when a change is made from recumbency to standing. It is believed that a slow
TESTS OF CIRCULATORY FITNESS. JAMA. 1927;89(3):207–208. doi:10.1001/jama.1927.02690030039018
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