Video:The Funk Factor: David Gray's Fat-Burning Workout

In the early 1990s, millions of Americans danced, kicked, and stepped their way through aerobics routines choreographed to the latest popular music. Dancer Jacki Sorensen spawned the exercise craze when she first set an Air Force exercise regimen to bouncy pop music in 1971. The proliferation of VCRs after the 1980s and the blockbuster success of Jane Fonda's first Workout video in 1982 meant that millions of Americans could work out at home by themselves, in front of the TV, rather than going to the gym. In 1991 national aerobics champion David Gray offered "The Funk Factor," one of a vast array of home-exercise videos setting aerobics routines to popular music. Not only did the new danceable exercise form help make Americans more healthy, it also helped change popular conceptions about ideal body types. The burly brawn of days gone by was replaced with a new image of a healthy body-lean and well-toned, as modeled by David Gray himself.