Our bodies need oxygen to survive, of course, but additional oxygen helps to decrease trauma and stress. A boost of oxygen in addition to what we normally get from breathing helps our bodies to work even better to keep us healthy. That's the idea behind EWOT, or Exercising With Oxygen Therapy, and you don't need to have COPD to use it.
If you get a major injury, the first thing an EMT will do is put an oxygen mask on your face. This doesn't necessarily mean that you can't breathe, that you're not getting enough oxygen to your lungs, or that your lungs were hurt. It simply reduces the amount of stress, and prevents additional damage caused by physical stress. You'll end up healing or recovering much quicker.
When your body is under any kind of stress, oxygen is burned up in your cells much faster than normal. When you're lacking in oxygen, cells begin to die, and your brain can't function as well. Your brain needs more oxygen than any other part of your body, about 25% of all the oxygen you breathe in goes to your brain.
Cancer, along with many other diseases, thrive in oxygen poor environments. Our bodies age and die because of the process of oxygen in our cells. When there isn't enough oxygen, our cells start to die off. When cells die off more and more, our bodies begin to weaken. We are more prone to illness, and lack of sufficient oxygen eventually leads to death.
When we exercise, our bodies burn up a lot more oxygen, which is what causes us to breathe heavier when we are working our muscles harder. Our hearts also have to pump faster to get more oxygen to the muscles and other parts of the body. This is why it's so important to breathe correctly when we work out. This is also why we need additional oxygen when exercising.
If you work out strenuously on a regular basis, you will need quite a bit of oxygen to support your body. Yes, exercise is good for you, but EWOT will give your body that boost that it needs. It helps to get the most out of your work out. You will burn more calories, and you'll build muscle quicker. You'll also feel more more energetic and have a lot more stamina. Muscle burn out is due to the muscles not getting enough fuel (oxygen or nutrients).
You normally breathe in 21% oxygen. With EWOT and an oxygen concentrator used for EWOT, you can breathe in double that amount. One red blood cell in your body can carry as much as 97% oxygen, and does so on a regular basis, as long as your lungs aren't damaged or sick. During EWOT, your blood plasma can carry additional oxygen, bringing it to 100% oxygen in your blood. You might think this 3% wouldn't make a difference, but it will make a world of difference in how you feel while exercising.