Swimming is a whole-body exercise, and almost all muscle groups and internal organs should actively participate in the activities, so it can increase the functions of various organs and systems and make the body get comprehensive exercise. Swimming requires all the moving organs of the human body to coordinate at the same time, so that the human body can develop in a balanced way from skin to internal organs and from upper limbs to lower limbs. Swimming is involuntary breathing under the pressure of water. When swimming, the relative increase of carbon dioxide in human body stimulates breathing, which not only exercises respiratory muscles, but also improves lung ventilation. Swimming can improve the heart's pumping function and oxygen delivery capacity, and can reduce people's diastolic pressure. This is because swimming improves the vascular reflex regulation ability of autonomic nervous system, thus reducing the peripheral vascular resistance of human body. In addition, swimming can improve aerobic metabolism, improve brain function, promote the brain's ability to reflect the external environment and intellectual development, improve the body's disease resistance, improve immune function and improve the body's adaptability to the external environment.

Weight loss effect of swimming

Swimming is an effective, safe and reasonable way to lose weight. Because the thermal conductivity of water is five times that of air, and the resistance of water is much greater than that of air when swimming, the heat consumed during swimming far exceeds that of many land sports. In particular, long-term slow swimming can consume fat energy, thus speeding up weight loss.