Dr. Phil Maffetone has changed the way most of us eat, train, run and live our lives. He joins The Nation to talk about the social stress of the "No Pain, No Gain" philosophy, hydration, getting enough vitamin D, using fish oils, and much more.

Here are some links to things we discussed:

• "Social Stress of 'N0-Pain No-Gain'" article
• HR threshold test
• The MAF Test
• Dr. Maffetone's Books
• Phil's Music