Blood pressure plays a very important role when running or cycling. When the genes open, blood pressure goes down and when the genes close, blood pressure goes up.
When we run or cycle, the genes open and cause fats to dissolve, for example, because the cells take in more oxygen with open genes and an increase in nerve electricity occurs, so that muscle intensity and speed increases, cellular hydration occurs, the muscle becomes softer and faster.
If the genes close, the molecules do not dissolve, less muscle intensity is produced, harder muscle, but it contracts less than with a lot of cellular hydration, loss of power and cadence, loss of nervous activity and increases blood pressure.
Psychological thoughts also play an important role when exercising. For example. When we exercise at high intensity and notice some danger, whether caused by an animal that scares us or any other danger, the genes can shut down causing an increase in blood pressure and oxygenation of the blood, not the muscles, and this effect is due to the fact that the body stores more oxygen in the blood, to be able to use it when facing danger.
If when we run at high intensity at very high heart rates and the genes do not shut down, we may suffer fainting or psychological discomfort.
It must be said that a thin person makes the heart work less than an obese person, because there are fewer cells absorbing oxygen from the blood and exhaustion is less.