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European Journal of Applied Physiology

, Volume 111, Issue 6, pp 1047–1054 | Cite as

Endurance exercise immediately before sea diving reduces bubble formation in scuba divers

  • Olivier CastagnaEmail author
  • Jeanick Brisswalter
  • Nicolas Vallee
  • Jean-Eric Blatteau
Original Article

Abstract

Previous studies have observed that a single bout of exercise can reduce the formation of circulating bubbles on decompression but, according to different authors, several hours delay were considered necessary between the end of exercise and the beginning of the dive. The objective of this study was to evaluate the effect of a single bout of exercise taken immediately before a dive on bubble formation. 24 trained divers performed open-sea dives to 30 msw depth for 30 min followed by a 3 min stop at 3 msw, under two conditions: (1) a control dive without exercise before (No-Ex), (2) an experimental condition in which subjects performed an exercise before diving (Ex). In the Ex condition, divers began running on a treadmill for 45 min at a speed corresponding to their own ventilatory threshold 1 h before immersion. Body weight, total body fluid volume, core temperature, and volume of consumed water were measured. Circulating bubbles were graded according to the Spencer scale using a precordial Doppler every 30 min for 90 min after surfacing. A single sub-maximal exercise performed immediately before immersion significantly reduces bubble grades (p < 0.001). This reduction was correlated not only to sweat dehydration, but also to the volume of water drunk at the end of the exercise. Moderate dehydration seems to be beneficial at the start of the dive whereas restoring the hydration balance should be given priority during decompression. This suggests a biphasic effect of the hydration status on bubble formation.

Keywords

Diving Decompression sickness Bubble Exercise Heat Hydration 

Notes

Acknowledgments

The authors wish to thank the following people for their valuable contributions to this work: Myriam Nicolas and Boualem Zouani, laboratory technicians, and Bruno Schmid, R&D technician. Olivier Dubourg, MD, medical doctor of “commando Hubert” French Navy Seal.

References

  1. Adams WC, Fox RH (1975) Thermoregulation during marathon running in cool, moderate, and hot environments. J Appl Physiol 38(6):1030–1037PubMedGoogle Scholar
  2. Astrand PO, Rodahl K (1986) Textbook of work physiology, 3rd edn. McGraw-Hill, New YorkGoogle Scholar
  3. Balldin UI (1973) Effects of ambient temperature and body position on tissue nitrogen elimination in man. Aerosp Med 44(4):365–370PubMedGoogle Scholar
  4. Berge VJ, Jorgensen A (2005) Exercise ending 30 min pre-dive has no effect on bubble formation in the rat. Aviat Space Environ Med 76(4):326–328PubMedGoogle Scholar
  5. Blatteau JE, Boussuges A (2007) Haemodynamic changes induced by submaximal exercise before a dive and its consequences on bubble formation. Br J Sports Med 41(6):375–379PubMedCrossRefGoogle Scholar
  6. Blatteau JE, Gempp E (2005) Aerobic exercise 2 hours before a dive to 30 msw decreases bubble formation after decompression. Aviat Space Environ Med 76(7):666–669PubMedGoogle Scholar
  7. Blatteau JE, Gempp E (2008) Predive sauna and venous gas bubbles upon decompression from 400 kPa. Aviat Space Environ Med 79(12):1100–1105PubMedCrossRefGoogle Scholar
  8. Blatteau JE, Souraud JB (2006) Gas nuclei, their origin, and their role in bubble formation. Aviat Space Environ Med 77(10):1068–1076PubMedGoogle Scholar
  9. Boussuges A, Retali G (2009) Gender differences in circulating bubble production after SCUBA diving. Clin Physiol Funct Imaging 29:400–405PubMedCrossRefGoogle Scholar
  10. Carturan D, Boussuges A (2002) Ascent rate, age, maximal oxygen uptake, adiposity, and circulating venous bubbles after diving. J Appl Physiol 93(4):1349–1356PubMedGoogle Scholar
  11. Dervay J, Powell M (2002) The effect of exercise and rest duration on the generation of venous gas bubbles at altitude. Aviat Space Environ Med 73(1):22–27PubMedGoogle Scholar
  12. Doi T, Sakurai M (2004) Plasma volume and blood viscosity during 4 h sitting in a dry environment: effect of prehydration. Aviat Space Environ Med 75(6):500–504PubMedGoogle Scholar
  13. Dujic Z, Duplancic D (2004) Aerobic exercise before diving reduces venous gas bubble formation in humans. J Physiol 555(Pt 3):637–642PubMedCrossRefGoogle Scholar
  14. Dujic Z, Valic Z (2008) Beneficial role of exercise on scuba diving. Exerc Sport Sci Rev 36(1):38–42PubMedCrossRefGoogle Scholar
  15. Dujić Z, Palada I, Valic Z, Duplancić D, Obad A, Wisløff U, Brubakk AO (2006) Exogenous nitric oxide and bubble formation in divers. Med Sci Sports Exerc 38(8):1432–1435PubMedGoogle Scholar
  16. Fahlman A, Kayar SR (2006) Nitrogen load in rats exposed to 8 ATA from 10–35 degrees C does not influence decompression sickness risk. Aviat Space Environ Med 77(8):795–800PubMedGoogle Scholar
  17. Francis T, Gorman D (1993) Pathogenesis of decompression disorders. In: Brubakk AO, Newman TS (eds) The physiology and medicine of diving, 5th edn. Saunders, London, pp 445–480Google Scholar
  18. Gempp E, Blatteau JE (2009) Preventive effect of pre-dive hydration on bubble formation in divers. Br J Sports Med 43(3):224–228PubMedCrossRefGoogle Scholar
  19. Gerth W, Ruterbusch V (2007) The influence of thermal exposure on diver susceptibility to decompression sickness. NEDU nov. (TR 06-07, TA 03-09), pp 1–70Google Scholar
  20. Gisolfi CV, Duchman SM (1992) Guidelines for optimal replacement beverages for different athletic events. Med Sci Sports Exerc 24(6):679–687PubMedGoogle Scholar
  21. Gisolfi CV, Summers RW (1992) Intestinal water absorption from select carbohydrate solutions in humans. J Appl Physiol 73(5):2142–2150PubMedGoogle Scholar
  22. Harvey E, Whiteley A (1944) Bubble formation in animals. J Cell Comp Physiol 24:1–34CrossRefGoogle Scholar
  23. Heyward VH (1996) Evaluation of body composition. Current issues. Sports Med 22(3):146–156PubMedCrossRefGoogle Scholar
  24. Higashi Y, Yoshizumi M (2004) Exercise and endothelial function: role of endothelium-derived nitric oxide and oxidative stress in healthy subjects and hypertensive patients. Pharmacol Ther 102(1):87–96PubMedCrossRefGoogle Scholar
  25. Jimenez C, Regnard J (2009) Whole body immersion and hydromineral homeostasis: effect of water temperature. Eur J Appl Physiol 108:49–58PubMedCrossRefGoogle Scholar
  26. Jurd KM, Tacker JC (2009) The effect of pre-dive exercise mode on post-décompression venous gas enboli. In: Ross JA (ed) Proceeding of the 35th annual meeting of the EUBS. Scotland, pp 106–107Google Scholar
  27. Katsenelson K, Arieli Y (2007) Hyperbaric oxygen pretreatment reduces the incidence of decompression sickness in rats. Eur J Appl Physiol 101(5):571–576PubMedCrossRefGoogle Scholar
  28. Landolfi A, Yang J (2006) Pre-treatment with hyperbaric oxygenation reduces bubble formation and platelet activation. Sport Sci Health 1(3):122–128CrossRefGoogle Scholar
  29. McLaughlin JE, King GA (2001) Validation of the COSMED K4 b2 portable metabolic system. Int J Sports Med 22(4):280–284PubMedCrossRefGoogle Scholar
  30. Nishi RY, Kisman KE (1981) Assessment of decompression profiles and divers by Doppler ultrasonic monitoring. In: Bachrach AJ, Matzen MM (eds) Underwater physiology, vol VII. Proceedings of the seventh symposium on underwater physiology. Undersea Medical Society, Bethesda, MD, pp 717–27Google Scholar
  31. Pontier JM, Blatteau JE (2007) Protected effect of single bouts of exercise 2 hours before dive. Bull Medsubhyp 17:23–32Google Scholar
  32. Roberts CK, Barnard RJ (1999) Acute exercise increases nitric oxide synthase activity in skeletal muscle. Am J Physiol 277(2 Pt 1):E390–E394PubMedGoogle Scholar
  33. Shirreffs SM (2003) Markers of hydration status. Eur J Clin Nutr 57(Suppl 2):S6–S9PubMedCrossRefGoogle Scholar
  34. Spencer MP (1976) Decompression limits for compressed air determined by ultrasonically detected blood bubbles. J Appl Physiol 40(2):229–235PubMedGoogle Scholar
  35. Vann R, Thalmann E (1993) The physiology and medicine of diving, chap 4. Saunders, London, pp 29–49Google Scholar
  36. Wasserman K, Whipp BJ (1973) Anaerobic threshold and respiratory gas exchange during exercise. J Appl Physiol 35(2):236–243PubMedGoogle Scholar
  37. Wisloff U, Brubakk AO (2001) Aerobic endurance training reduces bubble formation and increases survival in rats exposed to hyperbaric pressure. J Physiol 537(Pt 2):607–611PubMedCrossRefGoogle Scholar
  38. Wisloff U, Richardson RS (2004) Exercise and nitric oxide prevent bubble formation: a novel approach to the prevention of decompression sickness? J Physiol 555(Pt 3):825–829PubMedCrossRefGoogle Scholar

Copyright information

© Springer-Verlag 2010

Authors and Affiliations

  • Olivier Castagna
    • 1
    • 2
    Email author
  • Jeanick Brisswalter
    • 2
  • Nicolas Vallee
    • 1
  • Jean-Eric Blatteau
    • 1
  1. 1.Biomedical Research Institute of the Army (IRBA)Naval Medical Institute (IMNSSA-Toulon), Departments of Operational Environment and Marine and Underwater ResearchToulon Cedex 9France
  2. 2.Laboratory of Human Motricity, Education and Health, University of Nice Sophia AntipolisNiceFrance

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