First, swimming safety points

1. Don't be too hungry or too full when you go into the water. Don't go into the water for an hour after meals to avoid cramps;

2. Try the water temperature before entering the water. If the water is too cold, don't go into the water.

3. Swimming in rivers, lakes and seas must be accompanied by someone, not swimming alone;

4. Observe the swimming environment before launching. You can't swim here if there is a danger warning.

Don't swim in the canyon with unclear geographical environment. The water in these places is different in depth and cold, and obstacles may hurt people in the water, which is very unsafe;

6. Before diving, make sure that the water depth here is at least 3 meters, and there are no weeds, rocks or other obstacles underwater. It is safer to enter the water with your feet first;

7. When swimming in the sea, you should be parallel to the coastline. Those who are not skilled in swimming or lack of physical strength should not get involved in the depths. Do it on the coast

A mark, pay attention to whether you are rushed too far, adjust the direction in time to ensure safety.

Second, how to prevent lower limb cramps when swimming?

You must warm up before swimming.

You should consider your physical condition before swimming. If you are too full, hungry or tired, don't swim.

Before swimming, splash some water on your limbs and then jump into the water. Don't jump into the water at once.

If you have chest pain while swimming, you can press your chest hard and wait until you get better before going ashore.

When you have abdominal pain, you should go ashore. You'd better drink some hot drinks or soup to keep warm.