What is the reason for fever after exercise

We all know that exercise can improve our body's resistance and is very helpful for us to prevent diseases. However, some people develop a fever after exercise. This is mainly because they sweat after exercise. If they do not pay attention to keeping warm and washing after sweating, it is easy to catch a cold and have a fever. Therefore, it is recommended that everyone should take relevant care methods after exercise to avoid the occurrence of colds.

What causes fever after exercise?

The reason for fever after exercise may be the increase in body temperature caused by sweating after exercise, which is a normal physiological phenomenon. It may also be the fever caused by catching a cold after exercise.

1. Normal physiological phenomenon

After exercise, the body's anabolism and catabolism will accelerate, so you will get hot and sweat and your body temperature will rise. This is a very natural physiological phenomenon. Specifically, anabolism is the process of synthesizing protein and fat from the food we eat. Catabolism is the process of breaking down the food we eat into energy, and the process of catabolism produces heat. Especially after strenuous exercise, blood flow accelerates and local fat burns, which can lead to low fever and may cause discomfort symptoms such as fever, dizziness, chest tightness, etc.

The body feels uncomfortable because while sweating, some inorganic salts and a large amount of water in the body are lost along with the heat. In addition, during exercise, oxygen is inevitably insufficient, causing the body to produce lactic acid through anaerobic respiration. The internal environment homeostasis fluctuates greatly. This is why you are very thirsty after exercise. At this time, it is recommended to drink more light salt water or soda water (to neutralize lactic acid).

2. Catch a cold or have a fever after exercise

There is another situation in which fever occurs after exercise. It may be caused by catching a cold after exercise, especially when a person's immunity is relatively low after strenuous exercise. For example, if you don’t wipe off the sweat in time and are blown by the wind, or if you take a cold shower, etc. Some people exercise the day before but develop a fever the next day. This is mostly due to this.

However, a large part of the reason why sweating during exercise leads to catching a cold, fever, etc. is simply because you did not take good care of the sweating after exercise. After sweating during winter exercise, you must wipe off the sweat on your body in time and change into fresh clothes, so you are less likely to catch a cold. It would be better if you could take a hot bath after fitness exercises in winter, and also remember to soak your feet in hot water every night.

How to relieve fever after exercise

The way to relieve fever after exercise is to first find out what causes the fever and then deal with it specifically.

How to relieve the normal physiological symptoms of fever after exercise

1. Cold compress in the early stage

After heavy weight training, you can immediately use ice packs to cool the target muscles. Generally, the cold compress lasts for 10 to 15 minutes. Place clothing or towels between the ice pack and the skin to prevent frostbite.

2. Supplement water and functional drinks

Water replenishment: It is very important to replenish water before, during and after exercise. Replenish water about 500cc of water before exercise, and replenish 100cc to 150cc of water every 10 to 15 minutes during exercise. Replenish water in small amounts and multiple times after exercise can speed up metabolism, promote muscle aerobic absorption, speed up muscle recovery, and reduce body fatigue.

Compared with water, functional drinks can replenish water and various nutrients at the same time. The specific nutritional components are compared as shown in the figure below:

3. Nutritional supplements

You can eat within 2 hours after training, mainly carbohydrates, fruits, vegetables and food protein, which is beneficial to restore muscle glycogen levels and help muscle recovery. Protein-rich foods include: eggs, peanut butter, canned tuna, whey protein powder, soybeans, yogurt, chicken breast, beef, etc.

4. Stretch

Stretching is divided into stretching before exercise and stretching after exercise. Stretching before exercise increases the range of motion by lengthening muscles and tendons, preventing and reducing muscle injuries during exercise. Stretching after exercise mainly involves stretching muscles and tendons, promoting the repair of muscles and tendons, and relieving pain after exercise.

5. Muscle massage

Do not massage the target muscles and soft tissues immediately after training. Immediate massage will increase the damage to the muscle microstructure, increase the harm to the body, and slow down recovery.

Generally, massage should be done 48 hours after training. If the trainee still feels pain in the leg muscles, it means that the trainee's ability to remove lactic acid is weak and there is still lactic acid residual in the muscle tissue. At this time, massage can be used for "external acid removal".