When there isn’t enough oxygen present, what happens is called anaerobic respiration. This anaerobic respiration results in only a partial breakdown of food molecules in order to continue producing energy. As a result lactic acid is produced as well. The lactic acid causes us to feel tired once it reaches certain sections of our muscles and blood.
Then once we are done moving, the body needs even more oxygen to break down the lactic acid. This is why we breathe heavily (pant) after exercising.
So this takes us directly to the first health benefit of oxygenated water. Getting more oxygen in the body will actually give us more energy and allow us to be more active for a longer period of time without feeling fatigued.
More oxygen in the blood means that aerobic respiration will take place, which means more energy in the body.