Jazzercise, which was founded in 1969 by professional dancer Judi Sheppard Missett, remains the original group fitness class for women. On International Women's Day, here's why it still matters.

Get ready to cringe, laugh, and maybe even feel a weird urge to dust off the boxes in your attic, because we're diving deep into the most radical (and questionable) fashion choices of the 1980s!