Bill Phillips, author of Body for Life (Harper Collins, 1999), works out to Claude Challe, who produces electronic jazz lounge music from Paris, particularly his Buddha Bar series; and also the Café Del Mar series.

Jorge Cruise, author of 8 Minutes in the Morning for Extra-Easy Weight Loss (Harper Resource, 2004), works out to Latin beats, such as salsa and samba; Madonna; and music from the ’80s.

Jim Karas, author of Flip the Switch (Harmony Books, 2002), works out to the soundtrack to The Big Chill.