Effect of water load in human body systems upon tolerance to +Gz acceleration

• Autorzy: Gembicka D.
• Języki publikacji: EN

Abstrakty

EN

Gembicka, D.: Effect of water load in human body systems upon tolerance to +Gz acceleration. Acta physiol, pol., 1989, 40 (4): 393-403. A possible improvement of +Gz acceleration tolerance, obtained in human subjects through administering specific volumes of water, viz. 7, 14 and 21 ml/kg body weight, to be drunk immediately before fcentrifuge examination in order to increase the volume of plasma, thus increasing the circulating blood volume, was the starting-point for this work. Two hundred healthy male subjects, aged 19.9±0.9, were classified in 4 main groups and 2 supplementary groups for examination. It was found that the water intake in volumes of 14 ml/kg body weight produced a significant mean increase in the acceleration tolerance of 0.8 G, and (that of 21 ml/kg body weight improved acceleration tolerance by 1.1 G on the average. The increase tolerance to acceleration was maintained throughout a period of about 30 minutes (for 14 ml/kg body weight) up to approximately 50 minutes (for 21 ml/kg body weight). The favourable effect of water load in the body systems upon +Gz acceleration tolerance was probably due to the increase of plasma volume (by 5.24% and 6.98% for 14 and 21 ml/kg body weight, respectively).

• Wydawca: -
• Czasopismo: Acta Physiologica Polonica
• Rocznik: 1989
• Tom: 40
• Numer: 4
• Opis fizyczny: p.393-403,fig.,ref.

Twórcy

autor

Gembicka D.

• Military Institute of Aviation Medicine, Warsaw, Poland

Bibliografia

• 1. Armitage, P. (1978) Metody statystyczne w badaniach medycznych. PZWL, Warszawa.
• 2. Burton, R. R. Leverett, S. D., Michaelson, E. D. (1974) Man at high sustained acceleration. Aviad. Space Environ. Med., 45. 1115-1136.
• 3. Gillingham, К. K., Crump, P. P. (1976) Changes in clinical cardiologic measurements associated with high +Gz stress. Aviat. Space Environ. Med. 47. 726-733.
• 4. Greenleaf, J. E., Brock, P. J. Haines, R. F. Rositano, S. A., Montgomery, L. D., Keil, L. C. (1977) Effect of hypovolemia, infusion, and oral rehydration on plasma electrolytes, ADH, renin activity, and +Gz tolerance. Aviat. Space Environ. Med. 48. 693-700.
• 5. Greenleaf, J. E., Van Beaumont, W., Bernauer, E. M., Haines, R. F., Sandler, H., Staley, R. W., Young, H. L., Yusken, J. W. (1973) Effects of dehydration on +Gz tolerance after 14-day's toed rest. Aerospace Med. 44. 715-722.
• 6. Grigoriev, A. I., Katkovsky, B. S., Savilov, A. A., Georgievsky, V. S., Dorokhova, B. R., Mikhailov, V. M. (1978) Effect of hyperhydration on the human tolerance Ito orthostatic and LBNP testis. Kosm. Biol. Aviakosm. Med. 6. 20-24.
• 7. Kokova, N. I. (1984) Effect of water-salt supplements on the head-to-feet acceleration tolerance after 7-day dry immersion and normal hinter activity. Kosm. Biol. Avikosm. Med. 4. 33-37.
• 8. Kokova, N. I. (1985) Hemodynamic parameters in subjects with various resistence to head-to-feet acceleration. Kosm. Biol. Aviakosm. Med., 5. 56-60.
• 9. Kożuchowska, L, Wojtkowiak, M. (1973) Zaburzenia wzrokowe podczas działania przyspieszeń dośrodkowych. Med. Lot. 41. 25-31.
• 10. Laughlin, M. H. (1986) The effects of +Gz on the coronary circulation a review. Aviat. Space Environ. Med. 57. 5-16.
• 11. Meehan, J. P. (1986) Cardiovascular receptors and fluid volume control. Aviat. Space Environ. Med. 57. 265-275.
• 12. Peterson, D, F., Bishop, V. S.., Erickson, H. H. (1977) Anti-G suit effect on cardio- vaiscular dynamics changes due to +Gz stress. J. Appl, Physiol. 43. 765-769.
• 13. Piemme, T. E,, Mc Cally, M., Hyde, A. S. (1966) Renal response to +Gz gradient acceleration in man. Aerospace Med. 37. 1253-1256.
• 14. Rogge, J. D., Moore, W, W., Segar, W, E., Fasola, A. F. (1967) Effect of +Giz and +Gx acceleration on peripheral venfous ADH levels in humans. J. Appl. Physiol. 23. 870-873.
• 15. Shubrooks, S. J. Jr., Burns, J. W,, Brickson, H. H. (1975) Coronary hemodynamics during positive (+Gz) acceleration. Aviat. Space Environ. Med. 46. 413-418.
• 16. Vartbaronov, R. A., Glod, G. D., Uglova, N. N., Rolik, I. S. (1987) Hypovolemic reactions in man and animals in response to increasing +HGz values. Kosm. Biol. Aviakosm. Med. 3. 35-39.
• 17. Voge, V. M. (1978) Comparison of several G-tolerance measuring methods ait various seattoacfc angles. Aviat. Space Environ. Med. 49. 377-383.
• 18. Wojtkowiak, M. (1976) Assessment of tolerance limits in subjects tested on human centrifuge. Artificial Satellites 11. 29-35.