T. Colin Campbell: Well, I mean really it should be a diet that is largely focused on plant-based foods, by that I mean vegetables and grains and fruits and legumes, of course, and in particular, sort of whole foods. I mean, we ought not to be taking (laughs), I mean plant foods are really the optimal diet.
Your working muscles can take oxygen out of the blood three times as well as your resting muscles. Your body has several ways to increase the flow of oxygen-rich blood to working muscle: 1  increased local blood flow to the working muscle. 2  diversion of blood flow from nonessential organs to the working muscle.3  increased flow of blood from the heart (cardiac output).our body has several ways to increase the flow of oxygen-rich blood to working muscle: 1  increased local blood flow to the working muscle. 2  diversion of blood flow from nonessential organs to the working muscle. 3  increased flow of blood from the heart (cardiac output).
Since your bloodstream is responsible for bringing the oxygen to your muscles, your heart needs to pump a great amount of blood for maintaining the oxygen supply to the muscles that are working. To fulfill this goal, the heart starts beating rapidly and forcefully, which increases the heartbeat. In addition to that, if you are exercising on a hot day, then too, the high temperature coupled with the vigorous activity performed by your heart will result in an abnormal increase in your heart rate.