Find the comfort of the floating body immediately after entering the water.

Middle-aged and elderly people or people with weak constitution should keep floating with minimal movements as much as possible. They can paddle with both hands, breathe evenly, close their eyes as if they were going to fall asleep, wake up suddenly or open their eyes by themselves, and get out of the water immediately when they feel more comfortable and relaxed than lying in bed. When you come out of the water, you should move slowly, feel the weight of your body in the water, and compare the feeling of floating in the water with the feeling of gravity on land. Some people are physically strong, so it's hard to feel this feeling, so swim a certain distance, and the action frequency should be low, so as to avoid the heartbeat speeding up, because it's easy to eliminate the feeling that has already happened. In this way, I lost weight for several days, and my swollen stomach felt relaxed, but my weight loss was very small. If you insist on swimming for 3-5 months, eat moderately and walk 1-2 kilometers every day, you can naturally lose weight slowly.

These four strokes focus on different parts of the body. Swimmers can choose their favorite strokes, focus on strengthening strength training in a certain part of the body, and lose body fat in a targeted manner.

In freestyle and backstroke, the thigh way is to kick the water up and down, and only breaststroke is a pedal clip. The former can make legs more slender, and the latter uses quadriceps femoris more, so it is very effective for strengthening leg strength.

In butterfly stroke, the arm strokes inward, which is similar to chest expansion. Exert more force on pectoralis major, extensor dorsi and rectus abdominis, and the exercise effect is also the best.

In freestyle, biceps brachii and triceps brachii exert more force, which can effectively exercise arm muscles and improve shoulder muscle strength.

When backstroke, the extensor dorsi will exert more force and stretch the back muscles. In addition, when backstroke, you need to lift your hips and slide, which is also an exercise for your hips.

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The heat consumed by staying in 12 degree water for 4 minutes is equivalent to the heat consumed by staying on land at the same temperature 1 hour. It can be seen that under the same time and intensity, the heat consumed in water is much larger than that on land. The energy consumed in exercise is constantly supplemented by sugar and fat in the body, so regular swimming will gradually reduce the excess fat in the body.