Int J Sports Med 2002; 23(3): 162-167
DOI: 10.1055/s-2002-23170
Physiology and Biochemistry
© Georg Thieme Verlag Stuttgart · New York

Cardiorespiratory Responses and Blood Lactate During an Experimental Run-Cycle Transition in Duathletes

O.  Galy1 2 3 , O.  Hue1 2 3 , A.  Boussana1 2 3 , D.  Le Gallais1 2 3 , C.  Prefaut1 2 3
  • 1UPRES EA 701. Laboratoire de Physiologie des Interactions, Service Central de Physiologie Clinique, Unité d’ Exploration Respiratoire, Centre Hospitalier Universitaire Arnaud de Villeneuve, Montpellier Cedex 5, France
  • 2Laboratoire ACTE, Unité de Formation et de Recherche des Sciences et Techniques des Activités Physiques et Sportives, Antilles-Guyane, Campus de Fouillole, Pointe à Pitre Cedex, France
  • 3UPRES EA, Laboratoire Sport, Performance, Santé, Unité de Formation et de Recherche en Sciences et Techniques des Activités Physiques et Sportives, Montpellier, France
Further Information

Publication History

June 25, 2001

Publication Date:
26 March 2002 (online)

Abstract

The aim of this study was to determine the effects of a prior run on the cardiorespiratory responses measured during a subsequent cycle segment. Twelve duathletes underwent three successive laboratory trials at an interval of one week: 1) an incremental cycle test, 2) 20 min of running followed by 20 min of cycling (RC), and 3) 20 min of control cycling (C) at the same intensity as the cycling segment of RC. Ventilatory data were collected every minute using a breath-by-breath automated system. Blood samples were collected to measure venous blood lactate concentration, [La], at rest, after the running and cycling segments of RC and after C. The results showed that the C segment of RC had significantly higher V˙E, V˙E/V˙O2, f and HR than C alone and significantly lower VT (p < 0.05) than C alone. Moreover, steady state during C of RC was reached at the 2nd min for V˙O2, V˙E, V˙CO2, V˙E/V˙O2, V˙E/V˙CO2, and V˙T; at the 4th min for R and HR, and at the 5th min for f. The C of RC induced a significant increase in [La] in comparison with C alone. We concluded that the first minute of cycling after running during an RC trial induced specific metabolic and cardiorespiratory responses.

References

  • 1 Barstow T J, Jones A M, Nguyen P H, Casabury R. Influence of muscle fiber type and pedal frequency on oxygen uptake kinetics on heavy exercise.  J Appl Physiol. 1996;  81 1642-1650
  • 2 Beaver W L, Wasserman K, Whipp B J. A new method for detecting anaerobic threshold by gas exchange.  J Appl Physiol. 1986;  60 2020-2027
  • 3 Boussana A, Matecki S, Galy O, Hue O, Ramonatxo M, Le Gallais D. The effect of exercise modality on respiratory muscle performance in triathletes.  Med Sci Sports Exerc. in press;  2001
  • 4 Borchers G E, Buckenmeyer P J. Triathlon: the swim to bicycle transition.  Med Sci Sports Exerc. 1987;  19 S49
  • 5 Brisswalter J, Hausswirth C, Smith D, Vercruyssen F, Vallier J M. Energetically optimal cadence vs. freely chosen cadence during cycling: effect of exercise duration.  Int J Sports Med. 1999;  20 60-64
  • 6 Dill D B, Costill D L. Calculation of percentage changes in volumes blood, plasma, and red cells in dehydratation.  J Appl Physiol. 1974;  37 247-248
  • 7 Durand F, Mucci P, Préfaut C. Evidence for an inadequate hyperventilation inducing arterial hypoxemia at submaximal exercise in all highly trained endurance athletes.  Med Sci Sports Exerc. 2000;  32 926-932
  • 8 Galbo H, Holst J J, Christensen N J. Glucagon and plasma catecholamine responses to graded and prolonged exercise in man.  J Appl Physiol. 1975;  38 70-76
  • 9 Guezennec C Y, Vallier J M, Bigard A X, Durey A. Increase in energy cost of running at the end of a triathlon.  Eur J Appl Physiol. 1996;  73 440-445
  • 10 Hardarson T, Skarphedinsson J O, and Sveinsson T. Importance of the lactate anion in control of breathing.  J Appl Physiol. 1998;  84 411-416
  • 11 Hausswirth C, Lehénaff D, Dréano P, Savonen K. Effects of cycling alone or in a sheltered position on subsequent running performance during a triathlon.  Med Sci Sports Exerc. 1999;  31 599-604
  • 12 Hue O, Le Gallais D, Chollet D, Boussana A, Préfaut C. The influence of prior cycling on biomechanical and cardiorespiratory response profiles during running in triathletes.  Eur J Appl Physiol. 1998;  77 98-105
  • 13 Hue O, Le Gallais D, Chollet D, Boussana A, Préfaut C. Ventilatory responses during experimental cycle-run transition in triathletes.  Med Sci Sports Exerc. 1999;  10 1422-1428
  • 14 Hue O, Le Gallais D, Chollet D, Préfaut C. Ventilatory threshold and maximal oxygen uptake in present triathletes.  Can J Appl Physiol. 2000;  25 102-113
  • 15 Hue O, Le Gallais D, Boussana A, Galy O, Chamari K, Mercier B, Préfaut C. Catecholamine, blood lactate and ventilatory responses to multi-cycle-run blocks.  Med Sci Sports Exerc. 2000;  32 1582-1586
  • 16 Jay H W, Scott K P, Stuart M K. Hemoglobin desaturation in highly trained athletes during heavy exercise.  Med Sci Sports Exerc. 1986;  18 168-173
  • 17 Kreider R B, Boone T, Thompson W R, Burke S, Cortes C W. Cardiovascular and thermal responses of triathlon performance.  Med Sci Sports Exerc. 1988;  20 385-390
  • 18 Kreider R B, Cundiff D E, Hammet J B, Cortes C W, William K W. Effects of cycling on running performance in triathletes.  Annals of Sport Medicine. 1988;  3 220-225
  • 19 Lepers R, Bigard A X, Hausswirth C, Guezennec C Y. Modélisation de l’enchaînement natation-cyclisme d’un triathlon en laboratoire. Influence sur la cinétique de la lactatémie.  Sci Sports. 1994;  10 131-139
  • 20 Mador J, Acevedo F A. Effect of respiratory muscle fatigue on breathing pattern during incremental exercise.  Am Rev Resp Dis. 1991;  143 462-468
  • 21 Mazzeo R S. Catecholamine responses to acute and chronic exercise.  Med Sci Sports Exerc. 1991;  23 839-845
  • 22 Millet G, Vleck V E. Physiological and biomechanical adaptations to the cycle-to-run transition in “Olympic triathlon”: review and practical recommendations for training.  Br J Sports Med. 2000;  34 384-390
  • 23 Préfaut C, Durand F, Mucci P. Exercise induced hypoxemia in athletes: a review.  Sport Med. 2000;  30 47-61
  • 24 Rice A J, Scroop G C, Gore C J, Thornton A T, Chapman M J, Greville H W, Holmes M D, Scicchitano R. Exercise-induced hypoxemia in highly trained cyclists at 40 % peak oxygen uptake.  Eur J Appl Physiol. 1999;  79 353-359
  • 25 Ries A L, Farrow J T, Clausen J L. Accuracy of two ear oximeters at rest and during exercise in pulmonary patients.  Amer Rev Resp Dis. 1985;  132 685-689
  • 26 Shum A, Johnson G F, Flattery K V. Influence of ambient temperature on excretion of catecholamines and metabolites.  Am J Physiol. 1969;  216 1164-1169
  • 27 Sothmann M, Gustafson A, Chandler M. Plasma free and sulfoconjugated catecholamine responses to varying exercise intensity.  J Appl Physiol. 1987;  63 654-658
  • 28 Wasserman K B, Whipp B J, Koyal S N, Beaver W L. Anaerobic threshold and respiratory gas exchange during exercise.  J Appl Physiol. 1973;  35 236-240

O. Galy

ACTES · UFR-STAPS Antilles-Guyane

97159 Pointe à Pitre Cedex · France ·

Phone: +590-882549 ·

Fax: +590-901768 ·

Email: galy.o@wanadoo.fr

    >