Teenagers live very busy lives now and often forget to think about their diets and exercise. The truth is, healthy eating along with regular(有规律的) exercise is the only way to k    fit.
During your teenage years, it is important to give your body the energy it needs. Teenage
g     need about 2,200 calories（卡路里）a day and boys need a little m    -- doctors suggest 2,800 for teenage boys. 50% of your calories should come f      rice, bread, vegetables and fruit. You also need to drink a lot of water, 6 to 8 glasses a day. Drinking e     water will improve your skin and give you healthy hair.
E    is something that can help to make you look good, feel good and be healthy. Experts（专家）suggest that teenagers spend at l     30 minutes exercising, five times a week.
W      you exercise, your body produces（产生）something that m    you feel relaxed. It can even help you s      better at night and let you pay more attention（注意）when you study.

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