After the exercise is to the body from exercise to normal. If we immediately stop Heart ever beat 130? 140 bpm is back to normal is 70 beats per minute in a short time, it could be dangerous. Because the lungs and heart of the time. Due to the amount of blood flow to the body, mainly to the muscles during workout. If you stop exercising immediately causes blood to flow back to the heart less by blood to a bottleneck in the blood vessels within the muscles, especially the muscles of the legs (pooling effect), the amount of blood squeezed out of the heart to send it. organs of the lower body, especially the brain, it can cause dizziness and fainting. We have to take 5-10 minutes to adapt is. Gradually reduced until the pulse is normal.