Asymmetrical Transients of Cardiorespiratory Variables in Response to Ascending and Descending Ramp Forcings of Exercise Load

  • Yoshimi Miyamoto
  • Kyuichi Niizeki

Abstract

Although the response kinetics of ventilatory and gas exchange variables to incremental ramp exercise have been studied intensively in connection with the development of noninvasive techniques for detecting the AT,1, 3 analysis of responses to decrementai ramp forcings is scarce except for the early work of Karlsson and Wigertz.4 They found that with decreasing ramp slope, in both the incremental and decrementai phases of the ramp exercise, the lag of the ventilation and heart rate responses behind the input stimulus became increasingly prolonged.

Keywords

Carotid Body Ramp Exercise Oxygen Uptake Kinetic Total Time Delay Mean Response Time 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    K. Wasserman, BJ. Whipp, S.N. Koyal and W.L. Beaver, Anaerobic threshold and respiratory gas exchange during exercise, J.Appl.Physiol. 35:236 (1973).PubMedGoogle Scholar
  2. 2.
    R.L. Hughson and M.D. Inman, Oxygen uptake kinetics from ramp work tests: variability of single testvalues, J.Appl.Physiol. 61:373 (1986).PubMedGoogle Scholar
  3. 3.
    G.D. Swanson and R.L. Hughson, On the modeling and interpretation of oxygen uptake kinetics from ramp work tests, J.Appl.Physiol. 65:2453 (1988).PubMedGoogle Scholar
  4. 4.
    H. Karlsson and O. Wigertz, Ventilation and heart-rate responses to ramp-function changes in work load, Acta Physiol. Scand. 81:215 (1970).CrossRefGoogle Scholar
  5. 5.
    K. Niizeki and Y. Miyamoto, Cardiorespiratory responses to cyclic triangular ramp forcings in work load, Jpn J.Physiol. 41:759 (1991).PubMedCrossRefGoogle Scholar
  6. 6.
    Y. Miyamoto, K. Niizeki and Y. Nakazono, Responses of ventilation, circulation and gas exchange to incremental and decrementai ramp forcings of exercise load, J.Appl.Physiol. (in press).Google Scholar
  7. 7.
    Y. Miyamoto, M. Takahashi, T. Tamura, T. Nakamura, T. Hiura and T. Mikami, Continuous determination of cardiac output during exercise by the use of impedance plethysmography, Med.Biol.Eng.Comput. 19:638 (1981).PubMedCrossRefGoogle Scholar
  8. 8.
    Y. Miyamoto, Y. Nakazono, T. Hiura and Y. Abe, Cardiorespiratory dynamics during sinusoidal and impulse exercise in man. Jpn J. Physiol. 33:971 (1983).PubMedCrossRefGoogle Scholar
  9. 9.
    G.A. Brooks and T.D. Fahey, Exercise physiology: “Human bioenergetics and its applications,” John Wiley & Sons, New York (1984).Google Scholar
  10. 10.
    K. Wasserman, B.J. Whipp and R. Casaburi, Respiratory control during exercise, In:“Handbook of Physiology,”. Sec.3, The respiratory system, Vol. 11, Control of breathing, Part 2, N.S. Cherniack and J.G. Widdicombe, ed., Am. Physiol. Soc. Bethesda pp.595 (1986).Google Scholar
  11. 11.
    U. Tibes. Reflex inputs to the cardiovascular and respiratory centers from dynamically working canine muscles, Circ.Res. 41:332 (1977).PubMedCrossRefGoogle Scholar
  12. 12.
    F.L. Eldridge, D.E. Millhorn, J.P. Kiley and T.G. Waldrop, Stimulation by central command of locomotion, respiration and circulation during exercise, Respir. Physiol. 59:313 (1985).PubMedCrossRefGoogle Scholar
  13. 13.
    F.L. Eldridge and P. Gill-Kumar, Central neural respiratory drive and afterdischarge, Respir.Physiol. 40:49 (1980).PubMedCrossRefGoogle Scholar
  14. 14.
    N. Lamarra, S.A. Ward and B.J. Whipp, Model implications of gas exchange dynamics on blood gasses in incremental exercise, J. Appl. Physiol. 66: 1539 (1989).PubMedGoogle Scholar
  15. 15.
    B.J. Whipp, J.A. Davis and K. Wasserman, Ventilatory control of the ‘isocapnic buffering’ region in rapidly-incremental exercise, Respir. Physiol. 76:357 (1989).PubMedCrossRefGoogle Scholar
  16. 16.
    M.S. Jacobi, V.I. Iyawe, C.P. Patil, A.R.C. Cummin and K.B. Saunders, Ventilatory responses to inhaled carbon dioxide at rest and during exercise in man, Clinic. Sci. 73:177 (1987).Google Scholar
  17. 17.
    D.M. Band and R.A.F. Linton, The effect of hypoxia on the response of the carotid body chemoreceptor to potassium in the anesthetized cat, Respir. Physiol. 72:295 (1988).PubMedCrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 1992

Authors and Affiliations

  • Yoshimi Miyamoto
    • 1
  • Kyuichi Niizeki
    • 1
  1. 1.Department of Electrical and Information Engineering Faculty of EngineeringYamagata UniversityYonezawaJapan

Personalised recommendations