1, cold weather, no activity before running? I have the same situation when I practice weight-bearing squat, and my knee hurts. However, the temperature has risen a little, so it's better when you warm up.
2. It's an injury. If it doesn't get better all the time and it gets worse, you should go to the hospital. Sometimes it hurts to grow a small bag on your foot.
The definition of running refers to the fastest way for land animals to move with their feet. It is defined as a step in sports, and both feet will not land at the same time. It can also be aerobic exercise or anaerobic exercise.
Running exercise is one of the most commonly used physical exercise methods, mainly because the technical requirements of running are simple and no special venues, clothes or equipment are needed.