The whole body is pushed out of the normal range when the nervous system, excretory system, muscles, joints are moving continuously for 42km.
Whether you are a professional athlete or need to exercise to relieve stress and exercise, jogging is a sport that boosts the physiological system in the body to the maximum. Even with the best athlete, running a full marathon (42 km) made them ache from head to toe. The whole body undergoes significant changes to adapt to the needs of the metabolism, thermostats when running at this distance.
At the starting line
When you wait for the call to race, the adrenaline rush increases so your heart rate gradually builds up. The brain starts sending signals to the lungs to increase breathing rate.
From the first steps, all physical support systems of the body such as skeletal, cardiovascular, respiratory, digestive, immune, nervous and endocrine systems will quickly fall into overload. When running, the heart will pump blood around the body 3 times more than when you rest. More blood is pumped from the heart to the muscles than the liver, kidney or spleen.
Respiratory and exothermic
The amount of heat generated from the body will increase by 30 to 40 during a marathon. In order to keep the body temperature constant at 36 to 38 degrees C, a part of the blood will be transported from the muscles to the skin, through the sweat glands, draining the heat to the outside to cool the body.
During the leg, you will lose 3 to 6 liters of sweat. Without timely rehydration, the runner is very likely to become dehydrated. The body will have to choose between transporting blood to the heart for the movement of the muscles that catch or supply blood to the capillary system under the skin, operating the body cooling system. Either way, your running record will suffer in a bad way.