The effect of hypoxia exercises on some blood gases and cells of adolescent swimmers

Por: Alireza Rahimi.

Athens 2004: Pre-olympic Congress

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Among those exercises which are done specially in swimming by the some of the coaches and the swimmers in the breath control oxygen exercise (Hypoxia or oxygen decreasing).Hypoxia is so called oxygen lost or decrement of the saved oxygen which concerning the intensity it is much less than anorexia or oxygen less.


The purpose of the research was the study of Hypoxia exercise on some blood biochemical parameters of adolescent swimmers .In this research 30 boys (trained) between 8-13 years were in two groups of experimental and control .The experimental group in exercise of Hypoxia method (Hypoventilation) and control group that uses the normal method exercised 6 sessions in a week and for 6 continuous week (36 sessions). Blood samples for determination of oxygen partial pressure (Po2), carbon dioxide partial pressure (Pco2), acidity (pH), bicarbonate (Hco3), hemoglobin (Hb) and hematocrit (HCT) changes were taken pretest and posttest during the rest time.


Data statistical analysis with using of t test student and paired t test indicates the increase significant of Pco2 (3.85 mmHg) and Hco3 (3.48 mEq/L) in experimental group (P=0.05). The comparison of the Po2 and pH bloods in experimental group shows a little decrease (0.19mmHg, 0.002). The results from the t test that related to the measurement of Hb and HCT in experimental group shows the decrease of these two parameters, but from statistical aspects they are not significant (0.22g/dl, 0.6%).
Our findings suggest that performance of this kind of exercise program may shift oxyhemoglobin dissociation curve to the right with increasing Pco2 and decreasing pH (Borh effect). In conclusion decreasing the affinity of oxygen to hemoglobin and oxygen is released faster than Hb and transmissibility, absorption and consumption of oxygen in active tissues also in skeletal muscles in increase.


[1]. Cecil M.Colwin- Swimming is to the 21st country.USA.1992.
[2]. Hsie.SS-The acute effects of controlled breathing swimming on glycolytic parameters. 1983







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