I'm surprised at the number of 'waking up to urinate' responses. That is worth mentioning to a doctor. More info here, how to tell if you have diabetes. There are other possible reasons for it, but that is a concern.

Someone mentioned sleep and healing, and that's my experience. If I have a cold or an injury, it's a little more time in bed for a very positive effect.

I'm 64 but in a slightly intense time of my life, and get less than 8 hours most nights.