[Cardiopulmonary dynamics during a maximal exertion test in Mexican endurance athletes].
OBJECTIVE
To search for cardiopulmonary (CP) kinetic and dynamic differences between Mexican resistance athletes (RES = 10) and non athletes (NON = 19).


METHODS
From the expired volume (Ve), measured by an open circuit spirometry, we calculated both VO2 and VCO2 during stress test while the volunteer pedalled seated on an electronic cycloergometer that started at 50 W.2 min-1 followed by increments of 25 W.2 min-1 each, until VO2máx was reached. The exercise transient time course (min) response (VO2, VCO2, Ve and heart rate, HR; and also O2 pulse, PulO2) was transformed to seconds and modelled by computer using linear regression technique by the interactive minimum squares method, and the mean response time (MRT) was used as an overall kinetic CP parameter.


RESULTS
The transient MRTs for VO2, VCO2 and Ve were slow in RES compared to NON. While the transient CP dynamics in NON lasted MRT_VO2 < (MRT_PulO2, MRT_FC) < MRT_VCO2 < MRT_Ve; the RES: both MRT_PulO2 and MRT_HR shifted to the right ((MRT_VO2, MRT_VCO2) < (MRT_PulO2, MRT_FC) < MRT_Ve). The relationships between the best sport profit mean velocity and both the MRT_VO2, MRT_VCO2 and MRT_PulO2 (GEK = gas exchange kinetics) showed fast_RES and slow_GEK, and slow_RES and fast_GEK.


CONCLUSIONS
The transient CP kinetics was slow in RES compared NON. It is possible to distinguish cardiopulmonary kinetic differences among resistance athletes holding different sport profiles.
Padilla
J
J
Escuela Superior de Medicina, IPN, México, D.F.
Martínez
E
E
Olvera
G
G
Ojeda Cruz
P
P
Caudillo Pérez
D
D
D000328:Adult; D000886:Anthropometry; D005080:Exercise Test; D006339:Heart Rate; D006801:Humans; D008800:Mexico; D008954:Models, Biological; D010807:Physical Endurance / Q000502:physiology*; D011659:Pulmonary Gas Exchange; D012123:Pulmonary Ventilation; D012420:Running / Q000502:physiology*; D016138:Walking / Q000502:physiology*