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Relative functional buffering capacity in 400-meter runners, long-distance runners and untrained individuals

  • K. Röcker
  • H. Striegel
  • T. Freund
  • H. H. Dickhuth
Article

Abstract

Buffering is a factor which influences performance in short and middle-term endurance by compensating exercise acidosis. The aim of the study was to establish whether respiration parameters are a relative measure of buffering capacity and to study the influence of buffering on specific performance parameters. Three groups (each of ten subjects) with defined degrees of adaptation [untrained (UT), aerobic-trained (AeT) and elite 400-m runners (AnT) with a best time of 48.47 ± 0.98 s] were examined in an incremental multi-stage test on the treadmill. Breath-by-breath gas analysis was performed using mass spectrometry and computer routines. Serum lactate concentrations were determined at each exercise level until subjective exhaustion. A value for the relative functional buffering capacity (re1FB) was calculated using exercise metabolic parameters. Running speed at the lactate threshold was used as the starting point of buffering. The start of respiratory compensation of acidosis (RCP) was taken as the endpoint of buffering. RCP was determined at the point of decrease in end-tidal CO2 content (CO2-ET). Re1FB was given in percent of buffering to running speed at RCP. Group AnT attained the same maximum performance data (maximum running speed, maximum rate of O2 consumption) as group AeT. However, these values were attained in group AnT with a significantly higher re1FB (AnT: 31.0±3.2% vs. AeT: 15.7±3.9%,P < 0.0001), while a higher lactate threshold indicated a greater oxidative capacity in AeT (AeT: 3.07±0.26 m · s−1 vs. AnT: 2.68±0.22 m · s−1). It is concluded that the combination of ventilatory parameters and determining the LT seems to be a useful measure for the total amount of buffering during high-intensity exercise. The higher content of buffer-active proteins in sprinters' muscles may be considered the main cause of their higher re1FB.

Key words

Buffering capacity Training Exercise-induced acidosis Respiratory mass spectrometry 

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References

  1. Beaver WL, Wasserman K, Whipp BJ (1986) Improved detection of the lactate threshold during exercise using a log-to-log transformation. J Appl Physiol 59:1936–1940Google Scholar
  2. Bell GJ, Wenger HA (1988) The effect of one-legged sprint training on intramuscular pH and nonbicarbonate buffering capacity. Eur J Appl Physiol 58:158–164Google Scholar
  3. Costill DL, Sharp RL, Rink WL, Katz A (1983) Determination of human muscle pH in needle biopsy specimens. J Appl Physiol 53:1310–1313Google Scholar
  4. Dickhuth HH, Huonker M, Münzel T, Drexler H, Berg A, Keul J (1991) Individual anaerobic threshold for evaluation of competitive athletes and patients with left ventricular dysfunction. In: Bachl N, Graham T, Löllgen H (eds) Advances in ergometry. Springer-Verlag, Berlin Heidelberg New York, pp 173–179Google Scholar
  5. Fabiato A, Fabiato F (1978) Effects of pH on the myofilaments and the sarcoplasmic reticulum on skinned cells from cardiac and skeletal muscle. J Physiol (Lond) 276:233–255Google Scholar
  6. Fretthold DW, Garg LC (1978) The effect of acid-base changes on skeletal muscle twitch tension. Can J Physiol Pharmacol 56:545–549Google Scholar
  7. Fuchs F (1979) The relationship between pH and the amount of calcium bound to glycerinated muscle fibers. Biochem Biophys Acta 585:477–479Google Scholar
  8. Grossie J, Collins C, Julian C (1988) Bicarbonate and fast-twitch muscle: evidence for a major role in pH regulation. J Membr Biol 105:265–272Google Scholar
  9. Hirakoba K, Maruyama A, Inaki M, Misaka K (1992) Effect of endurance training on excessive CO2 expiration due to lactate production in exercise. Eur J Appl Physiol 64:73–77Google Scholar
  10. Kindermann W, Keul J, Huber G (1977) Physical exercise after induced alkalosis (bicarbonate or tris buffer). Eur J Appl Physiol 37:197–204Google Scholar
  11. Mader A, Heck H (1986) A theory of the metabolic origin of anaerobic threshold. Int J Sports Med 7:45–65Google Scholar
  12. McKenzie DC, Parkhouse WS, Hearst WE (1982) Anaerobic performance characteristics of elite Canadian 800 meter runners. Can J Appl Sport Sci 7:158–160Google Scholar
  13. McNaughton J (1992) Sodium bicarbonate ingestion and its effects on anaerobic exercise of various durations. J Sports Sci 10:425–435Google Scholar
  14. Neville ME, Boobis LH, Brooks S, Williams C (1989) Effect of training on muscle metabolism during treadmill sprinting. J Appl Physiol 67:2376–2382Google Scholar
  15. Parkhouse WS, McKenzie DC, Hochacka PW, Ovalle WK (1985) Buffering capacity of deproteinized human vastus lateralis muscle. J Appl Physiol 58:14–17Google Scholar
  16. Parry-Billings N, Blomstrand E, McAndrew N, Newsholme EA (1990) A communicational link between skeletal muscle, brain and cells of the immune system. Int J Sports Med 11:122–128Google Scholar
  17. Poole DC, Schaffartzik W, Knight DR, Derion T, Kennedy B, Guy HJ, Prediletto R, Wagner PD (1991) Contribution of exercising legs to the slow component of oxygen uptake kinetics in humans. J Appl Physiol 71:1245–1253Google Scholar
  18. Roecker K, Steinacker JM, Stanch M (1990) Transcutaneous monitoring of pCO2 for the noninvasive determination of the anaerobic threshold. Med Sci Sports Exerc abstract (Suppl 22):54Google Scholar
  19. Sharp RL, Costill DL, Fink WJ, King DS (1986) Effects of eight weeks of bicycle ergometer sprint training on human muscle buffer capacity. Int J Sports Med 7:13–17Google Scholar
  20. Sutton JR, Jones NL, Toews CJ (1981) Effect of pH on muscle glycolysis during exercise. Clin Sci 61:331–338Google Scholar
  21. Trivedi B, Danforth WH (1966) Effect of pH on the kinetics of frog muscle phosphofructokinase. J Biol Chem 241:4110–4221Google Scholar
  22. Wasserman K (1987) Determinants and detection of anaerobic threshold and consequences of exercise above it. Circulation 76:29–39Google Scholar
  23. Wasserman K, McIllroy MB (1964) Detection of anaerobic metabolism in cardiac patients during exercise. Am J Cardiol 14:844–852Google Scholar
  24. Whipp BJ, Ward SA (1980) Ventilatory control dynamics during muscular exercise in man. Int J Sports Med 1:146–159Google Scholar
  25. Whipp BJ (1983) Ventilatory control during exercise in humans. Annual review of physiology 45:393–413Google Scholar
  26. Wilkes D, Gledhill N, Smith R (1983) Effect of acute induced metabolic alkalosis on 800 m racing time. Med Sci Sports Exerc 15:277–280Google Scholar
  27. Yeh MP, Gardner RM, Adams TD, Yanowitz FG (1982) Computerized determination of pneumotachometer characteristics using a calibrated syringe. J Appl Physiol 53:280–285Google Scholar

Copyright information

© Springer-Verlag 1994

Authors and Affiliations

  • K. Röcker
    • 1
  • H. Striegel
    • 1
  • T. Freund
    • 1
  • H. H. Dickhuth
    • 1
  1. 1.Medizinische Klinik und PoliklinikEberhard-Karls-Universität TübingenTübingenGermany

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