End-tidal pressure of CO2 and exercise performance in healthy subjects

High arterial CO 2 pressure ( P a CO 2 ) measured in athletes during exercise suggests inadequate hyperventilation. End-tidal CO 2 pressure ( P ET CO 2 ) is used to estimate P a CO 2. However, P ET CO 2 also depends on exercise intensity (CO 2 production, ) and ventilation efficiency (being P ET CO...

Full description

Saved in:
Bibliographic Details
Published in:European journal of applied physiology 2008-08, Vol.103 (6), p.727-732
Main Authors: Bussotti, Maurizio, Magrì, Damiano, Previtali, Emanuele, Farina, Stefania, Torri, Anna, Matturri, Marco, Agostoni, Piergiuseppe
Format: Article
Language:English
Subjects:
Adult
Aerobics
Anaerobic Threshold
Biomedical and Life Sciences
Biomedicine
Carbon Dioxide - blood
Carbon Dioxide - metabolism
Exercise
Female
Human Physiology
Humans
Hyperventilation
Hyperventilation - metabolism
Hyperventilation - physiopathology
Male
Metabolism
Middle Aged
Muscle, Skeletal - metabolism
Occupational Medicine/Industrial Medicine
Original Article
Partial Pressure
Physical fitness
Pulmonary Ventilation
Reference Values
Respiratory Mechanics
Sports Medicine
Tidal Volume
Ventilators
Workloads
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:High arterial CO 2 pressure ( P a CO 2 ) measured in athletes during exercise suggests inadequate hyperventilation. End-tidal CO 2 pressure ( P ET CO 2 ) is used to estimate P a CO 2. However, P ET CO 2 also depends on exercise intensity (CO 2 production, ) and ventilation efficiency (being P ET CO 2 function of respiratory rate). We evaluated P ET CO 2 as a marker, which combines efficiency of ventilation and performance. A total of 45 well-trained volunteers underwent cardiopulmonary tests and were grouped according to P ET CO 2 at respiratory compensation (RC): Group 1 ( P ET CO 2 35.1–41.5 mmHg), Group 2 (41.6–45.7) and Group 3 (45.8–62.6). At anaerobic threshold, RC and peak exercise, ventilation ( ) was similar, but in Group 3, a greater tidal volume (Vt) and lower respiratory rate (RR) were observed. Peak exercise workload and were lowest in Group 1 and similar between Group 2 and 3. Group 3 subjects also showed high peak suggesting a greater glycolytic metabolism. In conclusion, a high P ET CO 2 during exercise is useful in identifying a specific respiratory pattern characterized by high tidal volume and low respiratory rate. This respiratory pattern may belong to subjects with potential high performance.
ISSN:1439-6319
1439-6327
DOI:10.1007/s00421-008-0773-z