Chinese Journal of Tissue Engineering Research ›› 2019, Vol. 23 ›› Issue (23): 3686-3691.doi: 10.3969/j.issn.2095-4344.1314

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Evaluation of the cardiopulmonary endurance: cardiopulmonary exercise test versus 6-minute two-step test 

Fan Chaoqun1, Xu Kai2, Nie Mingjian1, Xu Wenfeng1, Wang Mei1   

  1.  (1Mass Sports Research Center, China Institute of Sport Science, Beijing 100061, China; 2Department of Exercise and Health Sciences, Nanjing Institute of Physical Education and Sports, Nanjing 210014, Jiangsu Province, China)
  • Received:2019-02-27 Online:2019-08-18 Published:2019-08-18
  • Contact: Wang Mei, Master, Researcher, Mass Sports Research Center, China Institute of Sport Science, Beijing 100061, China
  • About author:Fan Chaoqun, PhD, Mass Sports Research Center, China Institute of Sport Science, Beijing 100061, China
  • Supported by:

    the National “12th Five-Year Plan” of Science and Technology Support Project of China, No. 2012BAK21B01 (to FCQ); the Scientific Research Foundation of National Sports General Administration Sports Science Institute of China, No. 2017-26 (to FCQ) and 2016-26 (to NMJ)

Abstract:

BACKGROUND: Cardiopulmonary exercise test plays an important role in the evaluation of cardiopulmonary function, but it needs strict laboratory environment, expensive equipment and professional testers. The test requires a maximum tolerance level of the subject, which is more risky.
OBJECTIVE: To evaluate the consistency of cardiopulmonary endurance by comparing the maximum oxygen uptake of the cardiopulmonary exercise test with the 6-minute two-step test.
METHODS: The study was approved by the Ethics Committee of Beijing Sport University. Sixty-seven volunteers were randomly enrolled and signed the informed consents. The maximal oxygen uptake was measured directly in the cardiopulmonary exercise test according to the BRUCE protocol. A week later, the same group of subjects underwent a 6-minute two-step test and indirectly estimated their maximum oxygen uptake using the reckoning equation. The maximum oxygen uptake of the two test methods was compared and analyzed.
RESULTS AND CONCLUSION: (1) The maximum oxygen uptake calculated by 6-minute two-step test was less than that calculated by cardiopulmonary exercise test. (2) There was a positive correlation between the maximum oxygen uptake of by 6-minute two-step test and the cardiopulmonary exercise test (r=0.861, P < 0.01). (3) There was a high correlation and consistency between the two methods (r=0.868, P < 0.01). (4) Therefore, 6-minute two-step test may be used as a sub-maximal load to estimate the level of cardiopulmonary endurance effectively.

Key words:  cardiopulmonary exercise test, cardiopulmonary function, cardiopulmonary endurance, maximal oxygen uptake, submaximal load, quantitative load, 6-minute two-step test, up and down the step, tissue construction

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