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2000, Number 3

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Arch Cardiol Mex 2000; 70 (3)

Dinámica cardiopulmonar durante una prueba de esfuerzo máximo en atletas mexicanos de resistencia

Padilla PJ, Martínez LE, Olvera SG, Ojeda CP, Caudillo PD

Language: Spanish
References: 47
Page: 268-284
PDF size: 313.87 Kb.


ABSTRACT

Aim: To search for cardiopulmonary (CP) kinetic and dynamic differences between Mexican resistance athletes (RES = 10) and non athletes (NON = 19). Method: From the expired volume (V. e), measured by an open circuit spirometry, we calculated both V. O2 and V.CO2 during stress test while the volunteer pedalled seated on an electronic cycloergometer that started at 50 W· 2min-1 followed by increments of 25 W· 2min-1 each, until V. O2máx was reached. The exercise transient time course (min) response (V.O2 , V. CO2, V. e 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 V. O2, V. CO2 and V. e were slow in RES compared to NON. While the transient CP dynamics in NON lasted MRT_V.O2‹ (MRT_PulO2, MRT_FC) ‹ MRT_V.CO2‹ MRT_V.e; the RES: both MRT_PulO2 and MRT_HR shifted to the right ((MRT_V.O2, MRT_V.CO2) ‹ (MRT_PulO2, MRT_FC) ‹ MRT_V. e). The relationships between the best sport profit mean velocity and both the MRT_V.O2, MRT_V.CO2 and MRT_PulO2 (GEK = gas exchange kinetics) showed fast_RES and slow_GEK, and slow_RES and fast_GEK. Conclusion: 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.


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