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标题：VO2 Kinetics during exercise performed at critical power in cyclists and untrained individuals
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作者：Renato Aparecido Corrêa Caritá ; Camila Coelho Greco ; Dalton Müller Pessôa Filho 等
期刊名称：Motriz. Journal of Physical Education. UNESP
印刷版ISSN：1980-6574
出版年度：2013
卷号：19
期号：2
页码：412-422
DOI：10.5016/5631
语种：Portuguese
出版社：UNESP - São Paulo State University
摘要：The objective was to analyze the oxygen uptake (VO2) kinetics during exercise performed at critical power (CP) in subjects with different aerobic status in cycling. Six trained cyclists (GT) and seven non-trained subjects (GNT) underwent to the following protocols in cyclergometer: (a) incremental to exhaustion to determine VO2max and its respective workload (IVO2max); b) three square-wave tests to exhaustion at 95-110% IVO2max to determine CP, and; (c) one square-wave test to exhaustion at 100%CP. During the exercise at CP the slow component expressed as absolute value (GT: 342.4+/-165.8 ml.min-1 vs. GNT: 571.3+/-170.1 ml.min-1) and as the relative contribution to the increase of VO2 during exercise (GT: 10.0+/-4.6% vs. GNT: 26.6+/-7.3%) were lower for trained subjects. The VO2 at the end of the exercise at PC (GT: 89.8+/-8.4%VO2max vs. GNT: 97.4+/-2.8%VO2max) was significantly lower in GT ( = 0.045), and similar to VO2max in GNT. Therefore, the aerobic level might influence the VO2 responses to exercise at PC.
其他摘要：The objective was to analyze the oxygen uptake (VO2) kinetics during exercise performed at critical power (CP) in subjects with different aerobic status in cycling. Six trained cyclists (GT) and seven non-trained subjects (GNT) underwent to the following protocols in cyclergometer: (a) incremental to exhaustion to determine VO2max and its respective workload (IVO2max); b) three square-wave tests to exhaustion at 95-110% IVO2max to determine CP, and; (c) one square-wave test to exhaustion at 100%CP. During the exercise at CP the slow component expressed as absolute value (GT: 342.4+/-165.8 ml.min-1 vs. GNT: 571.3+/-170.1 ml.min-1) and as the relative contribution to the increase of VO2 during exercise (GT: 10.0+/-4.6% vs. GNT: 26.6+/-7.3%) were lower for trained subjects. The VO2 at the end of the exercise at PC (GT: 89.8+/-8.4%VO2max vs. GNT: 97.4+/-2.8%VO2max) was significantly lower in GT ( = 0.045), and similar to VO2max in GNT. Therefore, the aerobic level might influence the VO2 responses to exercise at PC.
关键词：Cyclists. Aerobic fitness. Heavy exercise.;Ciclistas. Aptidão aeróbia. Exercício pesado.
其他关键词：Cyclists. Aerobic fitness. Heavy exercise.