jogging hogs reveal the dramatic effects of exercise on health. in one investigation, a group of hogs was trained to run approximately 100 miles per week. Then the researches narrowed the arteries that supplied blood to the hogs hearts. the hearts of the jogging hogs developed extensive alternate pathways for flood supply, and 42% of the threatened heart tissue was salvaged compared with only 17 percent in a control group of nonjogging hogs.
