There is a right time to eat, sleep, exercise, and take medicine. We can't look at a clock for the right time for these activities. We must listen to the clock inside our bodies: the biological clock(生物钟)。
Barbara Wells exercised every morning. She woke up at 6: 00 a. m. She ran about two miles before she went to work. But Barbara's legs and back started to hurt. She did some exercise before she ran. But her legs and back still hurt. She ran slower, but the pain didn't stop. Barbara talked to her doctor. The doctor said, "Don't run in the morning. Try to exercise later in the day. That is the time when your body is at the right temperature for exercise after work." Her legs and back didn't hurt anymore.
Today, doctors are learning more about chronobiology, the study of biological clocks. They are learning about the importance of time for our bodies. For example, it is best for people to go to sleep on time every night and to eat only when they're hungry. Also, doctors found that some illnesses, such as heart attacks, occur(发生) most often in the morning. This information tells them that the best time to take heart medication may be at night.
Many doctors believe chronobiology(生物钟学) can help us live healthier lives. It may be the right time to listen to these doctors!
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