A run of poor sleep can affect the internal workings of the immune system and how the body responds to damage and stress.
Tests are good—no doubt about that. However, at the moment there is no cure. Scientists are working towards finding a drug that could eliminate the effects of sleep deprivation. Sleep accentuates regeneration of the immune, nervous, skeletal and muscular systems in the body.
On the other hand, my husband doesn't sleep well. He tosses and turns to get comfortable, has violent dreams where he kicks and shouts and invariably catches up on missed zzzzs in the morning.
This works well for me, allowing me free time to write my blog and carry on writing my books. I wake bright and fresh with a positive outlook and cheerful disposition. I follow a routine to carry me through a productive morning. When I greet Mr. Grumpy-head with a kiss and a reassuring rub on the shoulder, he begins to brighten. I learned this one morning last week when he asked me what was the matter. That took me aback. When asked what he meant, he said, "You're always so cheerful in the morning."
So, unable to help my own husband, I have no help to offer all the bad sleepers. I can only add that my conscience is clear, my outlook positive and my trust in goodness, God, and a higher power, intact.