24-hour gyms are quickly gaining in popularity. Relatively inexpensive and open all hours, they're well-suited to busy modern life. A close look at patrons reveals many reasons why people want to tone their bodies. Some people must stay fit to keep their jobs; others need more strength to care for elderly parents; and some try to conquer something within themselves. This program examines the human motivations that bring patrons to the gym from early in the morning until late at night.