IRCT20190720044283N3 IRCT 2021-10-23 University of Guilan Effect of sodium bicarbonate on anaerobic capacity under hypoxia and normoxia The acute effect of pre-anaerobic workout sodium bicarbonate intake on heart rate, heart rate variability, rating perceived exertion and anaerobic power of male athletes under hypoxic and normoxic conditions 2021-10-02 anticipated 12 Complete https://irct.ir/trial/59467 interventional Randomization: Randomized, Blinding: Single blinded, Placebo: Used, Assignment: Crossover, Purpose: Other, Randomization description: Use the random selection method by Excel software. In this method, we first enter the names of the subjects in Excel, and then in another part, we specify the position of the desired groups in two separate sections of 6 subjects. Then in these two sections, we will execute the following code so that people are randomly placed in groups of 6 subjects. =INDEX($A$3:$A$12,RANDBETWEEN(1,ROWS($A$3:$A$12)),1), Blinding description: In this study, the subjects were not aware of how the supplement or placebo was distributed. The G-physician was aware of the subjects receiving the supplement to take action if any possible allergies to the supplement occurred. Then, the physician weighed the supplement and placebo using the determined amount per weight of each subject and delivered it to the subjects for consumption in his presence by coding on each day of the test. N/A Muscle fatigue during exercise activity. Intervention 1: Intervention group: Subjects will consume 0.3 grams of sodium bicarbonate per kilogram of body weight one hour before the start of the activity. After the initial measurements and warm-up, the anaerobic activity of the Wingate will be performed by the Monark cycle ergometer and by a training mask (Phantom Athletics 001 model) in hypoxic conditions. The test process will take 9 minutes and then 30 minutes at rest (sitting) the desired variables will be monitored. Intervention 2: Intervention group: Subjects will consume 0.3 grams of sodium bicarbonate per kilogram of body weight one hour before exercise. After the initial measurements and warm-up, the anaerobic activity of the Wingate will be performed by the Monark cycle ergometer under normoxic conditions and without a mask. The test process will take 9 minutes and then 30 minutes at rest (sitting) the desired variables will be monitored. Intervention 3: Control group: Subjects will receive the same amount of placebo, which contains dextrose. After the initial measurements and warm-up, the anaerobic activity of the Wingate will be performed by the Monark cycle ergometer and by a training mask (Phantom Athletics 001 model) in hypoxic conditions. The test process will take 9 minutes and then 30 minutes at rest (sitting) the desired variables will be monitored. Intervention 4: Control group: Subjects will receive the same amount of placebo, which contains dextrose. After the initial measurements and warm-up, the anaerobic bouts of the Wingate will be performed by the Monark cycle ergometer under normoxic conditions and without a mask. The test process will take 9 minutes and then 30 minutes at rest (sitting) the desired variables will be monitored. Undecided - It is not yet known if there will be a plan to make this available Justification or reason for indecision in sharing IPD is The data release schedule is not yet known.