Exercise—walking, running, dancing, moving—enhances and extends our lives. Yet many of us think of exercise as a chore. Discover how exercise can be a source of joy. Guest: Kelly McGonigal, PhD, research psychologist, speaker (her 2013 TED Talk, "How to Make Stress Your Friend," has been viewed more than 21 million times), and author of The Upside of Stress (2015) and The Joy of Movement (2019).