First of all, when people run, most of them use the strength of their legs and hands. Other parts of the body, such as back muscles and abdominal muscles, do not play a big role. We can feel this from the physical fatigue after running a marathon. If you run a marathon, your thighs and calves will feel very sore, and your shoulders and biceps will feel sore from swinging your arms.

The muscles used for swimming are almost the whole body. Take freestyle as an example, you have to paddle with your hands, which also requires the strength of your back and shoulders, and you have to put your head out of the water to breathe. It is necessary to ensure that the abdomen and neck have enough strength to raise their heads and use their lungs when breathing, which not only exercises vital capacity, but also greatly improves people's endurance.

Not only that, legs also play a great role in freestyle, constantly swinging legs to get forward thrust. Long-distance swimming will make you ache all over the next day.

Not only is swimming very effective in reducing fat, but some sports such as skipping rope or hiit aerobics are also better than running. Jumping rope for 20 minutes is similar to running for 40 minutes. Of course, the advantages of running are irreplaceable by these sports. The soles of your feet will be pulled when you run. As we all know, there are many acupoints on the soles of the feet, among which Yongquan point can get similar massage effect when running.

I want to remind you that no matter what exercise you do, you should do it step by step. You can't run 10 km without exercise for a long time, which is very harmful to your health. After running, you should also do stretching exercises, which can stimulate muscles and prevent muscle hypertrophy or lactic acid poisoning. Soaking feet is also a good choice, preferably hot water, to promote the decomposition of lactic acid by the respiratory system.