Wikipedia
Prancercise
Prancercise is a holistic fitness method based on "a springy, rhythmic way of moving forward, similar to a horse’s gait and ideally induced by elation" created by Joanna Rohrback.
It has been compared to the low-impact aerobics that were popularized by 1980s workout videos.
Many parodies were created in reaction to Joanna’a original video, which themselves have accumulated hundreds of thousands of views.