Although it is only early spring, many people can't help but want to swim in the water. Indeed, the water in the indoor swimming pool never seems to warm the body in winter, and swimming is always tied behind. It's great now, the room temperature is about 10 degrees Celsius, and with the heating, it's not so cold even when we land. But swimming in spring is quite easy to cause cramps, so I suggest you eat some high-calorie food before swimming, so that your body can replenish energy faster and prevent cramps. High-calorie foods can be "meat" such as meat and eggs, or desserts such as cakes, chocolates and cheese, or directly supplement trace elements such as sodium, calcium and phosphorus to protect your body in a short time. If you swim for a long time, you need to supplement sugary drinks during exercise, preferably sports drinks, which can make up for the water consumed during exercise and improve blood sugar levels. It is best to supplement high-calorie food within 30 -60 minutes before swimming. With the "bottom" of high-calorie food, you don't have to be afraid to go into the water.