Abstract
We determined propulsive force and energy consumption in tethered swimming, and examined the relationship of both parameters. Subjects were eight well-trained swimmers. The subjects took a belt at waist, and a rope was connected to the belt. Weight was attached at the end of rope through pulleys. Swimming times were five minutes in breast and crawl style. Four and five kinds of weight as loads were ranged from 1.43 kg to 5.03 kg for male and female subjects, respectively. The forces at both swimming styles were determined using a strain gage. Expired air was collected to a Douglas bag for 20 seconds immediately after each swimming trial (Costill et al. 1985). Gas samples were analyzed using a Scholander gas analyzer for oxygen and carbon dioxide. Oxygen uptake in crawl style was larger than that in breast style at which the loads were above 2 kg. The peak force of kick showed higher value than that of pull and crawl. These results indicate that there is no relationship between peak force and oxygen uptake in breast and crawl style, and propulsive force may be related to integrated force during a stroke in swimming.
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