You have to do weight training once in two days

Muscle exercise is effective only once every two days.

Muscle exercise is essential to strengthen immunity and physical strength. Increasing muscle mass can also slow down the speed of "aging." However, if you exercise too much muscle, side effects will occur, so you should be careful.

If you exercise your muscles every day, your muscles will not grow properly. Muscles are made up of numerous strands of muscle fiber. Muscle fiber is slightly damaged when muscle exercise is performed, and at this time, satellite cells (cells that help muscle growth) and protein in our body regenerate damaged muscle fiber. In order to regenerate muscle fibers and train muscles smoothly, you need to take a day off. 

Dr. Negoro Hideyuki, a former Harvard University professor, also wrote in his book, "It takes time for the muscles to contract and strengthen the damaged muscles to turn into "thick muscle fibers," adding, "It's not good for the body or hormones because the muscles don't recover." Therefore, it is better to rest the day after weight training. Nevertheless, if you want to do muscle exercise every day, you alternately do upper body exercise one day and lower body exercise the next day.

On the other hand, it is normal to develop moderate muscle pain while exercising muscles, but if severe muscle pain persists, the intensity of exercise may be too high. In particular, if muscle pain continues to the extent that you cannot walk due to pain, and if you have a fever and swelling as well as pain, you are "muscle fatigue.

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" Muscle fatigue refers to a state in which the muscle has lost its ability to exert strength. At this time, the risk of tendon or ligament injury increases. If injured, you may have to take a break from exercise for at least a few months or a year at the longest. Therefore, about three times a week is appropriate for muscle exercise with a large load.