Leg muscle soreness is a normal physiological phenomenon during exercise. While muscle contraction produces energy, a series of changes have taken place inside the muscle. Adenosine triphosphate, creatine phosphate and glycogen can release energy. If the intensity is too high, blood circulation can't keep up, oxygen supply is insufficient, and lactic acid accumulates, which will stimulate the nervous system and cause pain.

People who have just started running usually feel sore and stiff muscles in their thighs and calves. After getting used to running, muscle pain will naturally stop appearing. Overtraining can also cause muscle pain, so you should shorten the running distance or consider stopping exercise first.

Extended data

Running needs to protect your feet.

(1) Try to choose a soft venue for morning exercise and fitness running. It is best to practice running on the track of the sports ground instead of running on the hard ground.

(2) Don't wear hard shoes when running. Try to wear shoes with soft soles and thick soles, preferably sports shoes and rubber shoes. You can wear cloth shoes when you don't have rubber shoes, but don't wear hard shoes and plastic shoes.

(3) Running posture should be scientific and reasonable. The heel should land first and quickly transition to the sole of the foot, so as to do a good job of buffering and reduce the resistance when landing. The rear pedal of the leg should be stretched. When your feet touch the ground, you should make good use of the cushioning force, not too hard, so that when you run, people feel that your feet are light and elastic, and you can also reduce the burden on your feet, which can last and avoid pain.

Baidu Encyclopedia: Muscle aches