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Genetic limit of functional adaptability

  • Vassilis Klissouras
Article

Summary

A pair of monozygous twins, a trained athlete and his identical untrained counterpart, were tested over a period of 1 1/2 years. Monozygosity was established on the basis of morphological traits and serological criteria. Repeated measurements obtained during basal conditions, submaximal and maximal exercise on a cycle ergometer disclosed that: a) the basal heart rate, respiratory rate, minute ventilation, vital capacity and forced expiratory volume were insensitive to training; b) cardiorespiratory displacement during submaximal work was smaller in the trained than in the untrained twin; and c) the maximum muscular force, mechanical power output, aerobic power and anaerobic capacity were about 10, 60, 37 and 60%, respectively, higher in the trained than in the untrained twin. The increase of the maximal aerobic power was attributed equally to an enhancement of the O2 transport and O2 utilization systems. It was concluded that although exogenous factors are important, a strong hereditary component sets a limit to functional adaptability.

Key words

Genetic Endowment Monozygous Twins Functional Adaptability Training 

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References

  1. Åstrand, P. O.: Commentary. In: Proceedings of International Symposium on Physical Activity and Cardiovascular Health. Canad. med. Ass. J.96, 730 (1967).Google Scholar
  2. - Engström, L., Erikson, B., Karlberg, P., Nylander, I., Saltin, B., Thoren, C.: Girl swimmers. Acta paediat. (Uppsala), Suppl.147 (1963).Google Scholar
  3. Daniels, J., Oldridge, N.: Changes hi oxygen consumption of young boys during growth and running training. Communication presented in the 17th Annual Meeting, Amer. College of sports Medicine, Alberquerque, New Mexico (1970).Google Scholar
  4. DeFares, J. G.: Determination of PVCO2 from the exponential CO2 rise during rebreathing. J. appl. Physiol.13, 159–164 (1958).Google Scholar
  5. Dencker, S. J., Hauge, M., Kaij, L., Meisen, A.: The use of anthropological traits and blood groups in the determination of the zygosity of twins. Acta genet. (Basel)11, 265–285 (1961).Google Scholar
  6. Dill, D. B., Phillips, E. E., MacGregor, D.: Training: youth and age. Ann. N.Y. Acad. Sci.134, 760–775 (1966).Google Scholar
  7. Douglas, F. G. V.: Effects of training on cardiorespiratory performance during maximal physical effort. Thesis, McGill University (1967).Google Scholar
  8. Ekblom, B.: Effect of physical training on oxygen transport system in man. Acta physiol. scand., Supp.328 (1969a).Google Scholar
  9. —: Effect of physical training in adolescent boys. J. appl. Physiol.27, 350–355 (1969b).Google Scholar
  10. —, Åstrand, P. O., Saltin, B., Stenberg, J., Wallstrom, B.: Effect of training on circulatory response to exercise. J. appl. Physiol.24, 518–528 (1968).Google Scholar
  11. Ferguson, R. J., Faulkner, J. A., Julinsa, S., Conway, J.: Comparison of cardiac output determined by CO2 rebreathing and dye-dilution methods. J. appl. Physiol.25, 450–454 (1968).Google Scholar
  12. Gedda, L.: Sports and genetics. A study on twins (351 pairs). Acta Genet. med. (Eoma)9, 387–405 (1960).Google Scholar
  13. Grande, F., Taylor, H. L.: Adaptive changes in the heart, vessels and patterns of control under chronically high loads. In: Hamilton, W. F., ed.: Handbook of physiology, Sect. 2: Circulation, Vol. III, pp. 2615–2677. Baltimore: Williams & Wilkms 1965.Google Scholar
  14. Jernerus, R., Lundin, C., Thomson, D.: Cardiac output in healthy subjects determined with a CO2 rebreathing method. Acta physiol. scand.59, 390–399 (1963).Google Scholar
  15. Klausen, K.: Comparison of CO2 rebreathing and acetylene methods for cardiac output. J. appl. Physiol.20, 763–766 (1965).Google Scholar
  16. Klissouras, V.: Heritability of adaptive variation, J. appl. Physiol.31, 338–344 (1971).Google Scholar
  17. Kuroda, E., Klissouras, V., Milsum, J. H.: Electrical and metabolic activities and fatigue in human isometric contraction. J. appl. Physiol.29, 358–367 (1970).Google Scholar
  18. Nickols, R. C., Bilbro, W. C., Jr.: The diagnosis of twin zygosity. Acta genet. (Basel)16, 265–275 (1966).Google Scholar
  19. Robinson, S.: Physiology of muscular exercise. In: Mountcastle, V. B., ed.: Medical physiology, ch. 32, p. 524. Saint Louis: Mosby Company 1968.Google Scholar
  20. —, Harmon, P. M.: The effects of training and of gelatin upon certain factors which limit muscular work. Amer. J. Physiol.133, 161–169 (1941).Google Scholar
  21. Rowell, L. B.: Factors affecting the prediction of the maximal oxygen intake from measurements made during submaximal work with observations related to factors which may limit maximal oxygen uptake. Dissertation, University of Minnesota, pp. 275 (1962).Google Scholar
  22. Saltin, B., Åstrand, P. 0.: Maximal oxygen uptake in athletes. J. appl. Physiol.23, 353–368 (1967).Google Scholar
  23. —, Blomqvist, G., Mitchell, J. H., Johnson, R. L., Wildenthal, K., Chapman, C. G.: Response to exercise after bed rest and after training. Circulation37, Suppl. 7 (1968).Google Scholar
  24. —, Hartley, L. H., Kilbom, A., Åstrand, L.: Physical training in sedentary middle-aged and older men. Scand. J. clin. Lab. Invest.24, 323–334 (1969).Google Scholar
  25. Skinner, J. S., Bar-Or, O., Bergstein, V., Bell, W., Royer, D., Buskirk, E. R.: Performance characteristics of retarded children. Communication presented in the 17th Annual Meeting, Amer. College of Sports Medicine, Albuquerque, New Mexico (1970).Google Scholar
  26. Ström, G.: The influence of anoxia on lactate utilization in man after prolonged muscular work. Acta. physiol. scand.17, 440–451 (1949).Google Scholar
  27. Wilmore, J. H., Behnke, A. R.: An anthropométrie estimation of body density and lean body weight in young men. J. appl. Physiol.27, 25–32 (1969).Google Scholar

Copyright information

© Springer-Verlag 1972

Authors and Affiliations

  • Vassilis Klissouras
    • 1
  1. 1.Ergophysiology Laboratory, Departments of Physiology and Physical EducationMcGill UniversityMontrealCanada

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