“People think we’re still doing what Jane Fonda did, even though, frankly, we never did that. But that’s the perception,” Missett (founder of Jazzercise) said. “We wouldn’t still be here. And I wouldn’t be here because I’d be bored to tears.”

Jazzercise distributes new music and moves to its 7,800 instructors every 10 weeks. 

“The kinds of movements I did in 1990 are different than today. Dance culture has changed, music has changed,” said Missett, who noted that the science has changed as well.