Document 72 Hours - Season 4 Episode 23

The number of users of 24-hour gyms is rapidly increasing. They are relatively inexpensive, and the convenience of being able to use them anytime and as much as they want is appealing to today's busy people. A closer look at gym users reveals a variety of reasons for working out. Some need to maintain their current physical shape to keep their jobs, some are working hard to improve their physical fitness to take care of their parents, and some are running to face their own problems. Each person's life lies beyond his or her muscles. We looked at the human characters who go to the gym from early in the morning to late at night.