Punching in running refers to checking attendance in the form of punching in the process of running, which proves that you have completed the specified amount of exercise. This method is a constraint and incentive for exercise. In addition, running punch cards are also common in fitness social platforms or applications. By punching in, you can track your running progress, analyze your running data, and share your exercise results with other runners. This kind of fitness socialization can provide motivation and encouragement, at the same time, it can also establish a healthy competitive atmosphere and make running exercise more interesting and meaningful.