The Effect of Different Critical Velocity Percentage on VO2, HR, LA during Aerobic Training in Swimmers

• Main Authors: Chih-Sung Chou, 周志松
• Other Authors: Hsin-Shan Lu
• Format: Others
• Language: zh-TW
• Published: 2005
• Online Access: http://ndltd.ncl.edu.tw/handle/37592814921233507228

碩士 === 國立臺灣體育學院 === 體育研究所 === 93 === 　　The purpose of this research aimed to discuss on taking different critical velocity (CV) as training indicator and conduct further observation in the respect of physical changes including heart rate (HR), blood lactate (LA), ventilation volume (VE), oxygen consumption (VO2), and volume of carbon dioxide (VCO2) of different CV intensity to confirm to adopt what intensity of CV for the important indicator when receiving aerobic exercise ability training intensity. Subjects of this research were consisted of fourteen senior high students (11 male students, 3 female students) from swimming team, age in 17±0.67, height in 168.22±6.48 cm., and weight at 64.07±7.54 kg. All subjects shall receive 50m, 100m and 200m front crawl test in maximum physical exertion, with the results carried over to D－T (distance－time) linear relation model to calculate each athlete’s critical velocity (CV), followed by conducting 400m freestyle swimming in 80%, 85%, 90%, 95% and 100% of CV intensity respectively and then measuring each physical change. Findings of this research indicated that the average CV was 1.322±0.118 m/sec, and for the negative association with results of 50m, 100m and 200m front crawl, the sequence is r = -0.578, -0.702, -0.999 (p<.05), all of which have reached marked standards. For LA, the result has reached marked standard (p<.05) through the analysis of one-way ANOVA, and LA was 3.79 ± 0.45 mM/L when at 90% CV intensity, LA is 5.22 ± 0.50 mM/L when at 95% CV intensity, LA is 6.42 ±0.65 mM/L when at 100% CV intensity. HR, VE, VO2, and VCO2 had achieved marked standard (p<.05) through the analytic result of Factorial ANOVA. In the respect of prediction over freestyle swimming, findings indicated that CV could not predict 50-m front crawl in short period, but produces high prediction on 200-m and 400-m front crawl. At 95% and 100% CV intensity, it appears a phenomenon that LA was higher than 4mM/L, indicating if there is the participation of oxygen energy metabolism. Therefore, taking CV intensity as aerobic training intensity is exactly overestimated and it can hardly be maintained long-time sports.