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Titolo:
EFFECTS OF CHANGES IN VENTILATION ON RESPIRATORY DISCOMFORT DURING ISOCAPNIC EXERCISE
Autore:
OKU Y; KUMP K; BRUCE EN; CHERNIACK NS; ALTOSE MD;
Indirizzi:
KYOTO UNIV,CHEST DIS RES INST,DEPT CLIN PHYSIOL KYOTO 606 JAPAN CASE WESTERN RESERVE UNIV,DEPT MED CLEVELAND OH 44106 CASE WESTERN RESERVE UNIV,DEPT BIOMED ENGN CLEVELAND OH 44106 VET ADM MED CTR CLEVELAND OH 44106
Titolo Testata:
Respiration physiology
fascicolo: 2-3, volume: 104, anno: 1996,
pagine: 107 - 114
SICI:
0034-5687(1996)104:2-3<107:EOCIVO>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
BREATHLESSNESS; HYPERCAPNIA; HUMANS; HYPERVENTILATION; SENSATION; DYSPNEA;
Keywords:
BREATHLESSNESS, ISOCAPNIC EXERCISE; EXERCISE, ISOCAPNIC, RESPIRATORY SENSATION; MAMMALS, HUMANS; SENSATION, RESPIRATORY; VENTILATION, RESPIRATORY DISCOMFORT;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
16
Recensione:
Indirizzi per estratti:
Citazione:
Y. Oku et al., "EFFECTS OF CHANGES IN VENTILATION ON RESPIRATORY DISCOMFORT DURING ISOCAPNIC EXERCISE", Respiration physiology, 104(2-3), 1996, pp. 107-114

Abstract

We studied the effects of changes in the level of ventilation on respiratory discomfort during isocapnic exercise. Six subjects exercised at 60 W on a cycle ergometer. They initially breathed 2.5% CO2 in oxygen for 75 breaths. Ventilatory parameters of the last 10 breaths were used as controls. In 7 subsequent test sessions each lasting 2 min alternating with 2 min free breathing periods, subjects tried to achieve atarget ventilation ranging from 0.7 to 1.3 times the control with a visual feedback system. End-tidal CO2 was regulated automatically at the control level by changing the inspired CO2. Breathing discomfort wasmeasured at the end of each session using a visual analog scale. Isocapnic constraining of ventilation (0.7 times the control) during exercise significantly increased respiratory discomfort (p < 0.05). Increases in ventilation had no significant effect. These results indicate that respiratory discomfort during exercise is exaggerated when the level of ventilation falls below that spontaneously adopted even when chemical drives are held constant.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/01/20 alle ore 01:52:52