This will eventually result in an accumulation of wear and tear leading to fatigue and degenerative diseases. Exercise and physical activity are an important part of a healthy lifestyle. However, if you are not getting enough sleep and rest to support the body in healing itself from the every day wear and tear, exercise will just inhibit your health. If you start exercising you will then need even more sleep. It you don't get enough sleep, exercise will just make you more worn and torn.
Many people burn out or receive constant nagging injuries from inadequate sleep.
If you continue to exercise with insufficient sleep, your body will eventually break down or stop growing. If you continue, you will incur injuries and must stop for several weeks as the body tries to catch up. Therefore adequate rest is not only good for building and repairing, but injury prevention itself. We send them to bed early because as parents we know the importance of sleep in growth. Yet as adults we are too naive or ignorant to the benefits of sleep for ourselves.