THE DIFFERENCES OF THE EFFECTIVENESS OF MUSCULAR ENDURANCE EXERCISE AND CONVENTIONAL EXERCISE TO ACID-BASE BALANCE (pH, PaO2, PaCO2 and HCO3) OF THE SPRINTER

Muscular endurance exercise will increase the muscle physiological function in the form of the increasing of mioglobin and mitochondria. The increasing of mioglobin and mitochondria will cause the ability of the muscle to catch the oxygen in the more maximum muscle contraction. Energy Source of sprinter comes from predominant anaerobic alactacid and anaerobic lactacid. The increasing of lactic acid level will influence pH and change the acid-base balance. However, by giving exercise, the influence of muscular endurance to acid-base balance of a sprinter has not been reported yet. The aim of this research is to find out the different influence between the group with muscular endurance exercise and the other group with conventional exercise to the changing balance of acid-base of a sprinter. Subjects were 20 men who had not been trained as sprinters. Sprinters, divided into two groups. Group (i) is the group which is given muscular endurance exercise by doing resistence-training of 15-25 RM about 3 sets. The training was done 3 times in a week. Group (ii) is the control group that follows the conventional exercise. Then after the subject sprints are measured changes in acid base balance (pH, PaO2, PaCO2 and HCO3). The results showed that there was a significant difference in the increase of pH and a significant increase in HCO2 (p<0.05), but there was no difference in the increase of pH and a significant decrease in PaCO2 (p>0.05). The conclusion of this study is that muscle endurance exercises are more effective in increasing the pH and HCO3 so that there is a change of acid base balance near normal than conventional exercise.