Let's face it, the reason we are on planet Earth is because it has Oxygen. What makes some humans perform better than others? Oxygen. Simple. Now the question becomes how do we get more oxygen in our bodies?
One way is through inject more red blood cells i.e. Blood Doping. Not too safe and risky.
Second way is through taking drugs like EPO that promote the creation of red blood cells. A drug and quite expensive. Also, it's illegal and if you race you will be caught.
The last way is through BEETS. Yes, Beets. Why do beets work, because they are high in Nitrates which IN SIMPLE TERMS convert to Nitric Oxide which helps in the transport of oxygen in and out of the mitochondria. Mitochondria are the power engines of the body. You want efficient ones just like a high performance car.
While EnduroBites has a great pre-training product called: Beta Red there are many others. In fact, just go to the market and get some BEETS. Your workout will thank you.