The Importance of Muscle Mass

As we age, we naturally become more metabolically unhealthy. 15 pounds of muscle are the difference between a 50% chance of dying the next 10 years for an older person versus 20%. And I think the data are undeniable here that poor sleep is causally related to poor health. When it comes to Alzheimer's disease, other forms of dementia and cardiovascular disease, chronic disruption of sleep is problematic.