номер C, страница 119 - гдз по английскому языку 10 класс учебник Комарова, Ларионова

Unit three.

Vocabulary in context.

Physical education.

No pain, no gain?

Health authorities recommend that teenagers exercise to increase their heart rates for twenty minutes, three times a week. Aerobic exercise like jogging, rollerblading, cycling, and martial arts is perfect for this. Apart from helping to develop muscle tone, stamina, and bone strength, aerobic exercise also stimulates the production of chemicals called endorphins in our brains. These are the body's natural way of giving us a high or feeling of elation. Traditional exercise like weight training is okay in moderation, but the old idea of no pain, no gain is out. After all, people won't do a workout if it hurts them.

Avoiding injury is simple if you start with a warm-up exercise to increase the flow of blood to your limbs. This will help minimize the risk of pulled muscles or even sprains. Similarly, warming down exercises are essential at the end of an exercise session.

Walking or stretching is ideal for helping your muscles recover.

In summary, although you may feel sore and tender in the initial weeks of a workout program, the rule for healthy exercising is, as soon as it becomes painful, it's time to stop.