How to Respond to Your Body Sports

When you tie your sneakers and walk out the door for a morning walk, or jump from the outskirts of the pool, then you're actually respond to command your conscious brain to the muscles harder. But that move, a number of changes will occur rapidly and automatically in your entire body.
Your muscles and work soon began to burn more energy to power their contraction. They do this by improving the process of converting oxygen and nutrients into ATP (the fuel used all of the cell) in each cell.
During aerobic activity undertaken on an ongoing basis such as brisk walking or running, your muscles may be used 15 to 25 times more energy than at rest, burn carbohydrates and fat stores in the mix around 50-50. During anaerobic (without air) is short and hard, like running 100 meters or short-distance swimming race across the length of the pool, your muscles may require up to 120 times more energy than the rest of time!
Your heart immediately began to beat faster to pump more blood to the muscles and other body tissues. During heavy exercise, your heart rate may be increased up to 150 times per minute or more (normal heart rate is 70-80 per minute at rest, for the average person).
This happens because once you start physical activity, the recipient nerve in the blood vessels, muscles and joints would imply the sympathetic nervous system to release epinephrine (adrenaline) and norepinephrine (nonadrelin) into the bloodstream. All of this happens quickly in order to speed up your heart rate. Indeed, the protective layer of the brain also play a role in the acceleration is where the experts have found that the heart rate began to beat faster even before they start exercising because the brain has to anticipate what will happen.
Although the average heart pumps about 5 liters of blood per day at rest, the amount may be increased up to 20 liters per minute during a hard workout. (The heart of trained athletes durability it can pump 40 liters per minute!).
The blood vessels are also undergoing rapid change as you start exercising. Because the nerve signals and chemical stimulation, relaxes the muscular wall of your arteries and causes the arteries dilate. At the same time, the edge shrinking veins forcing more blood into your circulation center. Smaller branch arteries leading to the muscle fibers also widened, while millions of capillaries that do not work (which supply blood directly to the fibers) will open. (At rest, only about one of 30 capillaries were open).
The result of all these changes is an increase in blood flow - which carry oxygen and essential nutrients - which by the swift flowing exercise your muscles, including the heart muscle receives more blood than during rest. Blood flow is maximized when every muscle relax, and stop when they contract and creates action 'milking' which helps pump blood to all parts of your body as you move.
Increased blood flow to the skin during mild exercise gives greater cooling effect (other than that, you will begin to sweat more). Meanwhile, the blood flow was taken away away from the kidney, liver, digestive system and other organs that are not directly involved in sporting activities.
Your lungs are also starting to breathe faster and more deeply so as to give your body more oxygen. This response is the result of a variety of stimuli including increased carbon dioxide in the blood (due to increasing use of residual oxygen), increased body temperature, and the message sent from the receiver senses chemical stimulation in your body. At break time, about 6.84 liters of air in and out of the lungs per minute. During hard training, this can be increased to 114 liters per minute.

Your metabolic rate - which depends on the number of calories you burn - increased between 4 to 20 times the normal rate of your metabolism, which depends on how heavy you are training.