DLCO response to experimental cycle-run succession in triathletes.
J Sports Med Phys Fitness
; 41(4): 441-7, 2001 Dec.
Article
en En
| MEDLINE
| ID: mdl-11687762
ABSTRACT
BACKGROUND:
We still know relatively little about the factors that define the ability to perform a good run after cycling in triathlon, however, and the perception of discomfort during the first minutes of this post-cycling running has yet to be satisfactorily explained. The pulmonary diffusion capacity for carbon monoxide (DLCO) has been demonstrated to be impaired after the cycle-run succession. Numerous causes have been suggested to explain this phenomenon, but the exact mechanism has not yet been determined.METHODS:
Thirteen young male triathletes participated in four different exercise trials 30 min of cycling followed by 20 min of running (C-R, 1 min rest between C and R), 30 min of running followed by 20 min of running (R-R, 1 min rest between R and R), 30 min of cycling (C), and 30 min of running (R). DLCO and alveolar volume were simultaneously measured during 9 sec of breath-holding before and 10 min after exercise. The transfer coefficient (KCO=DLCO/VA) was then calculated. During all trials, ventilatory data were collected every minute using an automated breath-by-breath system.RESULTS:
The results showed that 1) C-R and C induced significant and identical decreases in DLCO and KCO in post-trial compared with pre-trial measurement (40.41+/-2.24 vs 43.49+/-2.36 ml x min(-1) x mm Hg(-1), p<0.01, and 39.37+/-2.16 vs 42.99+/-2.38 ml x min(-1) x mm Hg(-1), p<0.02, for C-R and C, respectively) and 2) there were no DLCO decreases in post-trial compared with pre-trial measurement in R-R and R.CONCLUSIONS:
We concluded that cycling exercise in itself seems to increase the immediate post-exercise DLCO impairment.
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Banco de datos:
MEDLINE
Asunto principal:
Carrera
/
Ciclismo
/
Monóxido de Carbono
/
Capacidad de Difusión Pulmonar
Límite:
Adult
/
Humans
/
Male
Idioma:
En
Revista:
J Sports Med Phys Fitness
Año:
2001
Tipo del documento:
Article