Correct fitness activities should include warm-up activities, formal fitness and relaxation activities. However, due to limited time or other reasons, many people often only do fitness, ignoring warm-up activities and relaxation activities. This is actually incorrect.
Adequate warm-up activities can warm up the muscles and joints of the human body before formal activities, prevent injuries to the greatest extent, and give the brain a preparation period. Relaxation after the event, like car maintenance, is conducive to the next fitness.
So no matter what exercise you do, you must do some warm-up activities before exercise, even if the time is short. After running, you can move your joints, especially the parts you want to practice in the gym. One should move.