A new study from the University of Gothenburg in Sweden suggests a new reason for young men to ditch their “couch potato” lifestyle. They say that men in their early 20s who engage in load-bearing exercise including sports such as basketball and volleyball for four hours per week are less likely to suffer from osteoporosis in old age. The hard exercise in the early years increases their bone mass and density, protecting them from bone loss later on. Bottom line, the more the body moves, the more the bones are built.