This is because of something called Cytochrome C-oxidase. Cytochrome C-oxidase blocks the respiratory chain. The respiratory chain is essentially when the body’s oxygen uptake and delivers it to a cell and the cell utilizes it. (6)
Cytochrome C-oxidase stands in front of the cell and blocks a percentage of the oxygen from being delivered. Also blocking the delivery of some nutrients. So where does nitric oxide come in? It comes in by pushing it out of the cytochrome out of the way, therefore, making it so that the respiratory chain can be completed and you can then get more oxygen to the cell which means more nutrients to the cell. Getting you a better muscle pump, better recovery after your workout, and better blood flow to the brain so you feel better as a whole. (6)(7)
There was a study done by the University of Exeter that shows the significance of nitric oxide. The study was done with beet juice which is high in nitrate which converts to nitric oxide. There were 8 test subjects and the study was performed over a span of 6 days. (8)
The test subjects were given 500 ml of beet juice. The beet juice was consumed before an intense indoor cycling workout. The same subjects were also tested with a placebo. None of the subjects were aware of the difference between the beets and the placebo (8) conclusion the study showed that when the test subjects consumed the beet juice, they found that there was a 49% increase in nitrate levels and a 19% increase in oxygen uptake to the cell. Meaning that their workouts were 19% easier. Then they also found that they lasted 16% longer in their workouts because the cells were not getting tired and they were able to get more oxygen. (8)
Nitric oxide comes in many different forms. This is a natural part of the body's production. Whether you are trying to increase your stamina, increase your blood flow, or overall performance, nitric oxide might be a good supplement for you.