title: [Human experiments of metabolism, blood alkalization and oxygen effect on control and regulation of breathing. I: room air exercise test].
abstract: OBJECTIVE
  Under the guidance of the holistic integrative physiology medicine, we reanalyzed the data during symptom-limited maximum cardiopulmonary exercise testing (CPET) in order to investigate control and regulatory mechanism of breathing.
  
  
  METHODS
  This study investigated 5 normal volunteers who accepted artery catheter, performed CPET room air. Continuous measured pulmonary ventilation parameters and per minute arterial blood gas (ABG) analysis sample parameters during exercise. All CPET and ABG data changes were standard analyzed and calculated.
  
  
  RESULTS
  With gradually increasing power, minute oxygen uptake(every breath oxygen uptake x respiratory rate = O2 paulse x heart rate) and minute ventilation (tidal volume x respiratory rate) showed nearly linear progressive increase during the CPET(compared with the rest stage, P < 0.05 - 0.001); Minute ventilation increased even more significant after the anaerobic threshold (AT) and respiratory compensation point. PaO2 was increased at recovery 2 minutes (P < 0.05); PaCO2 was decreased after anaerobic threshold 2 minutes (P < 0.05); [H+]a was increased from AT (P < 0.05), and rapidly raised at last 2 minutes, remained high at recovery. Lactate was increased rapidly from AT (compared with resting, P < 0.05); bicarbonate decreased rapidly from AT (compared with resting, P < 0.05) and it's changed direction was contrary to lactic acid.
  
  
  CONCLUSIONS
  In order to overcome the resistance of the power during exercise, metabolic rate othe body increased, respiratory change depend upon the change metabolism, and the accumulation of acidic products exacerbated respiratory reactions at high intensity exercise.
authors.forename: Xi
authors.initials: X
authors.lastname: Yin
authors.forename: Xing-guo
authors.initials: XG
authors.lastname: Sun
authors.forename: W W
authors.initials: WW
authors.lastname: Stringer
authors.forename: Gui-zhi
authors.initials: GZ
authors.lastname: Wang
authors.forename: Jing
authors.initials: J
authors.lastname: Lv
authors.forename: Wan-gang
authors.initials: WG
authors.lastname: Ge
authors.forename: Fang
authors.initials: F
authors.lastname: Liu
authors.forename: Zheng
authors.initials: Z
authors.lastname: Ci
authors.forename: K
authors.initials: K
authors.lastname: Wasserman
mesh_terms: D015308:Anaerobic Threshold; D001784:Blood Gas Analysis; D005080:Exercise Test; D064368:Healthy Volunteers; D006339:Heart Rate; D006801:Humans; D010100:Oxygen; D010101:Oxygen Consumption; D012123:Pulmonary Ventilation; D012119:Respiration; D012143:Respiratory Physiological Phenomena; D013990:Tidal Volume
chemical_list: D010100:Oxygen