Exercise physiology
...onsisted of one minute stages that began at a speed of 2.67 m/s and a 0% grade. The subjects completed a submaximal economy session four to seven days after the VO2 max tests. During the tests VO2 steady state was measured at six different speeds. Each run was 8 minutes in duration and there were 10 minutes rest periods between the runs. An average of the final five minute VO2 values were used as the VO2 for each speed. Each run was done at the same time of day, with the same foot wear and tests were done in duplicate within two days. The experimental procedures were as follows. Total body mechanical power was measured. Two cameras filmed the subject using two dimensional techniques, as they preformed the test. The video captured images from the right and left sides of the subject. The video was used to digitize two strides per subject at each running speed. The cameras tracked segment displacement and it subsequently calculated segmental energies. Mechanical cost was determined from total body mechanical energy and work. Energy transfer between body segments influences mechanical cost. Complete transfer of energy forms within a segment and between all segments was provided for in the total transfer work algorithm. For statistical analyses, differences in means between the first and second submaximal running session were evaluated using the two separate sessions times the six running speeds. This gave them their analysis of variance procedures with repeated measures. The analysis showed no differences in running sessions. Simple regressions were performed to describe the response of the variable across the speed range. The results were as follows. There was no significant regression slope for MBTC versus running speed...