Abstract des Autors

Eighteen female voluteers were randomly divided into three experimental groups which trained 10, 20, or 30 minutes a day at a heart rate of 144 beats per minute, three days per week for six weeks on a bicycle ergometer. Subjects were tested before and after the conditioning period to determine the effects of the conditioning programs on cardiovascular efficiency. The two tests administered during each testing period were the Astrand Test of Predicted Maximal Oxygen Uptake and a test of physical work capacity. The results indicated that all three groups significantly improved in cardiovascular efficiency between Test I and Test II. Predicted maximal oxygen uptake values increased five, five, and eight ml/kg per min. in the 10-, 20-, and 30-min. groups, respectively. Times in the physical work capacity test increased 24, 50, and 35 sec. in the three respective groups. The 30-min. group, however, showed a more consistent increase in cardiovascular efficiency than the other two. Verf.-Referat