Meditation while walking has a long, noble history in ancient spiritual disciplines.

The most common objection that I hear to walking as exercise is that it's too easy, that only sweaty, strenuous activity offers real benefits. But there is abundant evidence that regular, brisk walking is associated with better health, including lower blood pressure, better moods and improved cholesterol ratios.

I'm still not comfortable recommending that people eat saturated fat with abandon, but it's clear to me that sugar, flour and oxidized seed oils create inflammatory effects in the body that almost certainly bear most of the responsibility for elevating heart disease risk.

If you have difficulty sleeping or are not getting enough sleep or sleep of good quality, you need to learn the basics of sleep hygiene, make appropriate changes, and possibly consult a sleep expert.

One of the most obvious ways dogs can improve our physical and mental health is via daily walks.

I have argued for years that we do not have a health care system in America. We have a disease-management system - one that depends on ruinously expensive drugs and surgeries that treat health conditions after they manifest rather than giving our citizens simple diet, lifestyle and therapeutic tools to keep them healthy.

Alternative models are neither right nor wrong, just more or less useful in allowing us to operate in the world and discover more and better options for solving problems.