期刊名称：Ovidius University Annals, Series Physical Education and Sport/Science, Movement and Health
印刷版ISSN：1224-7359
出版年度：2011
卷号：11
期号：2
页码：352-359
语种：English
出版社：Ovidius University Press
摘要：The purpose of our investigation was to compare some physiological,metabolic and respiratory responses in roller ski and submaximal running exercise at preferred levels of exertion.Four males and six females junior cross-country ski racers performed 30 min submaximal roller skiing and running (75% HR max) at least 2 days between bouts for any given subject.Heart rate (HR),Oxygen uptake ( O2),carbon dioxide production ( CO2),tidal volume (VT),oxygen pulse (O2 pulse),minute ventilation (VE),respiratory exchange ratio (RER) and metabolic equivalent (MET) were monitored continuously using a portable,breath by breath spirometry system.Blood samples were obtained from fingertip at baseline,at the end and five minutes after exercise and analyzed for whole blood lactate concentration.The same test protocol was used for all two exercise modes.HR,O2,CO2,O2 pulse and MET were significantly higher in running than roller skiing only in the first three minutes of exercise sessions.A significantly higher O2 was observed during running exercise than roller skiing,but there were no differences in lactic acid levels,minute ventilation and RER.Tidal volume also showed a significant increase in roller ski exercise after 15 minutes compared to running.We conclude that roller ski and running are both equally valuable for training endurance ability in cross-country skiers.Coaches and athletes should be aware that roller ski and running elicit similar blood lactate concentration and heart rate at a given exercise intensity.Future studies should compare the cardiovascular training effects of running and roller ski exercise in individuals of varying levels of fitness and skiing ability.
