Running is becoming popular these days. Many of us run for health. Doctors say many health problems come from these bad habits: eating and drinking too much, smoking and not taking enough exercise. Doctors tell us. "Eat and drink less, don't smoke, and exercise more." Running is a good way of exercise because it helps to build a strong heart. It also helps most people lose weight. One 68-year-old woman runs three times a week. "I love to eat." She says. She runs to lose _  Running is good for health in other ways, too. Many runners say running keeps colds and other small health problems away. "Running is my doctor." says one man. Running can also help people to relax. So today men and women of all ages    enjoy running. .The writer mainly  tells us  _  .
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