Gretchen Reynolds and The First Twenty Minutes

Gretchen Reynolds, the author of the New York Times column "Phys Ed," has been writing about the science of health and fitness for a more than a decade.  Host David Naimon talks with Reynolds about her book "The First 20 Minutes."

Learn why Reynolds, after writing this book, started to exercise less, the difference between being fit and being skinny, the downsides of stretching and sit-ups, and the health benefits of standing.

(This is an archival interview that originally aired in 2013.)