Some experts have analyzed that the thermal conductivity of water is 26 times greater than that of air, and the heat dissipation of water at the same temperature is more than 20 times faster than that of air. This will effectively consume human body heat. Sports physiologists' tests show that swimming in water consumes 100 calories, which is equivalent to running 400 meters on land, riding a bike 1000 meters, or skating 1500 meters, which is why you feel hungry soon after swimming.

Water pressure to prevent diseases

When swimming, the human body is in a horizontal state, which is very beneficial for the blood of lower limbs and systemic veins to return to the atrium. The pressure of water on the chest cavity promotes the deepening of breathing and increases the vital capacity. The cold stimulation of water temperature on the skin causes the blood vessels to contract and expand rapidly. There is a swimming hospital in Japan, which specializes in treating people with kidney disease, obesity, asthma, allergies and other endocrine diseases by training, helping them to exercise and recover their health.

Swimming is a whole-body exercise, because there is buoyancy in the water, so there is no need to support the body's extra physical strength when moving on the ground. So it is very beneficial to treat chronic diseases. When swimming, the chest and abdomen are under the pressure of water, and the role of respiratory muscles is strengthened. It can also treat tracheitis and emphysema.

Butterfly slimming posture is because the waist affects the body, which can eliminate the fat around the waist for a long time, make it soft, powerful and slender, and achieve beautiful lines.

The breaststroke slimming method is due to the full expansion and contraction of the thighs during swimming, which can eliminate the fat inside the thighs and turn them into strong muscles, so that the fat on the thighs will not rub against each other when walking.

Freestyle—

1. Make the arm lines symmetrical, firm, beautiful and soft.

2. Make hip muscles firm and elastic to prevent sagging.

3. Modify the leg lines to make the legs look even, beautiful and slender.

Upward type-

1. It is very effective to eliminate excess fat in the abdomen, so that there is no loose fat in the abdomen, exercise the elasticity of the feet and waist, and make it firm.

2. You can keep your chest straight and not prone to sagging.