Substance use disorder occurs when a person needs alcohol or another substance (drug) to function normally. Abruptly stopping the substance leads to withdrawal symptoms. Addiction means that a person has a strong urge to use the substance and cannot stop, even if they want to.
So it is important to maintain positive nitrogen balance in the body while sleeping. When you do and conditions are right so that your rate of protein synthesis exceeds your rate of degradation, and you maintain a positive nitrogen balance, you can grow while you sleep.
Stage 4 is the stage of deepest sleep, followed by stage 3. It is during stage 4 that growth hormone is secreted and the body begins to repair itself. The immune system also works hard during this stage. This is why, when falling ill, a good nightâs rest helps one to feel better.