She’s known as Jumpin’JaqFlash! From her website:
Hi there, I’m Jaq (not to be confused with Jackie). I have been a group fitness instructor since 2002, specializing in steelmace, interval training, rowing, cycling and dance. I continuously work with fitness professionals to create high-energy classes that incorporate a variety of weight training and provide intense cardio workouts. Before launching into group fitness I began my dance training when I was only three. Studying ballet, tap, jazz, pointe, modern, lyrical and hip-hop dance all on the competitive level. I then joined and toured with International Hip Hop Company Dance2XS and moved on to dance professionally for the AFL Chicago Rush Adrenaline Rush Dancers and the NBA Chicago Bulls Luvabulls. My deep understanding of body movement and mobility give me an exciting edge to the strength community.