The increased sugar and insulin flowing in the blood to the muscles during exercise causes more sugar to be burned. The old belief that people should not exercise if they have high blood sugar is wrong. The exercise usually helps lower the blood sugar. Many people just seem to feel better when they exercise daily. They tend not to tire as easily.
Some people even say they are happier.
Teenagers get much of their support from friends. Friends often are made during sports activities. Exercise can give people the opportunity to mix with others. Sometimes people feel sorry for themselves. When they do this, they become stressed and produce adrenaline that can raise the blood sugar level.