Do you have trouble sleeping at night? Then maybe this is for you. When you worry about needing sleep and toss and turn trying to find a comfortable position, you’re probably only making matters worse. What happens when you do that is that your heart rate actually increases, making it more difficult to relax. You may also have some bad habits that contribute to the problem. Do you rest frequently during the day? Do you get virtually no exercise, or do you exercise strenuously late in the day? Are you preoccupied with sleep, or do you sleep late on weekends? Any or all of these factors might be leading to your insomnia by disrupting your body’s natural rhythm. What should you do, then, on those sleepless nights? Don’t bother with sleeping pills. They can actually cause worse insomnia later. The best thing to do is drink milk or eat cheese or tuna fish. These are all rich in amino acids and help produce a neurotransmitter in the brain that induces sleep. This neurotransmitter will help you relax, and you’ll be on your way to getting a good night’s sleep. Until tomorrow’s broadcast, this has been another in the series “Hints for Good Health.”

【生词摘录】
1. toss and turn: keep changing your position in bed because you cannot sleep 辗转反侧
2. strenuously: adv. in a strenuous manner; strongly or vigorously 使劲地
3. preoccupied: adj. thinking about something a lot, with the result that you do not pay attention to other things 全神贯注的，入神的［+with］
4. insomnia: n. ［U］the condition of not being able to sleep 失眠
5. tuna: n. ［C］a large sea fish caught for food 金枪鱼（一种食用海鱼）
6. amino acid: one of the substances that combine to form proteins 氨基酸
7. neurotransmitter: n. ［C］transmits nerve impulses across a synapse 神经传递素
8. broadcast: n. ［C］a programme on the radio or on television（电台或电视的）广播节目；播送节目
9. hint: n. ［C］a useful piece of advice about how to do something 有益的建议

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