title: [Study on the exercise test in young health men].
abstract: OBJECTIVE
  To define the reaction of the respiration and circulation; and to find methods to quantitatively evaluation dyspnea and evaluate the methods that determine anaerobic threshold(AT) with the healthy man during exercise.
  
  
  METHODS
  Exercise test was used for 43 healthy young man to measure the index of gas metabolism and artery potassium. The relation between the index of Borg scale (BS) and the oxygen uptake per minute (VO2) was observed. The methods of how to obtain anaerobic threshold(AT) were evaluated by the five kinds of gas metabolism.
  
  
  RESULTS
  (1) VD/VT were significantly decreased from the rest to the maximal load exercise (0.28 +/- 0.55 vs 0.19 +/- 0.55, P < 0.01). (2) Seran potassium is state of after exercise (3.76 mmol/Lvs +/- 0.29 mmol/Lvs 4.10 mmol/L +/- 0.38 mmol/L, P < 0.01). (3) BS were closely correlated with VO2 during exercise, From the linear regression line 3 variables Borg scale slop(BSS), Threshold load of dyspnea(TLD), and breakpoint load of dyspnea (BLD), could be derived for quantitative evaluation of dyspnea. (4) ATVCO2 were1208 ml/min +/- 233 ml/min, and it were consistent with ATVE and ATVEO2 (P > 0.05).
  
  
  CONCLUSIONS
  The artery potassium is increased after exercise in young health men. The methods of quantrta-tive evaluation of dyspnea can be used during exercise. It is suitable for AT to obtained by the sharp turning point of the carbon dioxide production (VCO2), minute ventilation (VE) and Ventilation equivalent oxygen (VEO2).
authors.affiliation: Institute of Respiratory Disease, First Affiliated Hospital, China Medical University, Shenyang 110001, China.
authors.forename: G
authors.initials: G
authors.lastname: Liu
authors.forename: Z
authors.initials: Z
authors.lastname: Liu
authors.forename: Y
authors.initials: Y
authors.lastname: Song
mesh_terms: D000328:Adult; D001794:Blood Pressure / Q000502:physiology; D004417:Dyspnea / Q000503:physiopathology*; D015444:Exercise / Q000502:physiology*; D005080:Exercise Test; D006339:Heart Rate / Q000502:physiology; D006801:Humans; D008297:Male; D010101:Oxygen Consumption; D011188:Potassium / Q000097:blood
chemical_list: D011188:Potassium