title: Blunted blood pressure response during hyperpnoea in endurance runners.
abstract: The purpose of this study was to elucidate the cardiovascular response during hyperpnoea in endurance-trained runners compared to sedentary controls. Twelve runners and ten sedentary individuals participated in this study. A maximal respiratory endurance test (MRET) was performed as follows: target minute ventilation was initially set at 30% of maximal voluntary ventilation (MVV12) and was increased by 10% MVV12 every 3min. The test was terminated when the subject could no longer maintain the target ventilation. Heart rate and mean arterial blood pressure (MBP) were continuously measured. Respiratory endurance time during the MRET was longer in the runners than the controls. The change in MBP during the MRET was lower in the runners compared to the sedentary controls (runners: 100.2±2.4mmHg vs.
  
  
  
  109.1±3.0mmHg at 6min of hyperpnoea). Therefore, the blood pressure response during hyperpnoea is blunted in endurance runners, suggesting that whole-body endurance exercise training attenuates the respiratory muscle-induced metaboreflex.
authors.affiliation: Graduate School of Medicine, Nagoya University, Nagoya, Japan.
authors.forename: Yuka
authors.initials: Y
authors.lastname: Itoh
authors.affiliation: Graduate School of Medicine, Nagoya University, Nagoya, Japan; Research Center of Health, Physical Fitness and Sports, Nagoya University, Nagoya, Japan. Electronic address: katayama@htc.nagoya-u.ac.jp.
authors.forename: Keisho
authors.initials: K
authors.lastname: Katayama
authors.affiliation: School of Health Sciences, Sapporo Medical University, Sapporo, Japan.
authors.forename: Erika
authors.initials: E
authors.lastname: Iwamoto
authors.affiliation: Faculty of Sport and Health Science, Ritsumeikan University, Kusatsu, Japan.
authors.forename: Kazushige
authors.initials: K
authors.lastname: Goto
authors.affiliation: Japan Institute of Sports Science, Tokyo, Japan.
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Suzuki
authors.affiliation: Japan Institute of Sports Science, Tokyo, Japan.
authors.forename: Toshiyuki
authors.initials: T
authors.lastname: Ohya
authors.affiliation: Graduate School of Sport and Health Science, Ritsumeikan University, Kusatsu, Japan.
authors.forename: Kenji
authors.initials: K
authors.lastname: Takao
authors.affiliation: Graduate School of Medicine, Nagoya University, Nagoya, Japan; Research Center of Health, Physical Fitness and Sports, Nagoya University, Nagoya, Japan.
authors.forename: Koji
authors.initials: K
authors.lastname: Ishida
mesh_terms: D056352:Athletes; D001794:Blood Pressure / Q000502:physiology*; D004562:Electrocardiography; D005080:Exercise Test; D006339:Heart Rate / Q000502:physiology; D006801:Humans; D006985:Hyperventilation / Q000503:physiopathology*; D008297:Male; D009929:Organ Size; D010807:Physical Endurance / Q000502:physiology*; D012129:Respiratory Function Tests; D012132:Respiratory Muscles / Q000033:anatomy & histology / Q000502:physiology*; D012420:Running / Q000502:physiology*; D057185:Sedentary Behavior; D055815:Young Adult
keywords: Blood pressure; Cardiovascular response; Endurance athletes; Respiratory muscle endurance