Document Type

Thesis - Open Access

Award Date


Degree Name

Master of Science (MS)

Department / School

Physical Education


The purpose of this investigation was to determine the effects of holding the work load constant and changing the rest periods between work intervals, upon the improvement of cardio respiratory efficiency of track men. During the spring semester of the 1965-66 school year, 27 freshmen students enrolled in the basic instruction program at South Dakota State University, who had indicated by questionnaire they had lettered in track in high school, volunteered for the program. The subjects were randomly placed into two experimental groups and one control group. After the completion of the testing period and statistical procedure employed, the study indicated the methods of training used in this experiment improved cardio-respiratory efficiency of the experimental groups significantly in comparison to the control group. The study also indicated that the unknown rest period group seems to be superior to the three minute rest period group in the recovery of the heart after exercise. (see more in text)

Library of Congress Subject Headings

Physical education and training
Physical fitness




South Dakota State University