In a hare brained effort to keep the club open, Samantha proposes the Eighties version of a Depression-era dance marathon. When that plan fails Debbie hatches a plan to buy Samantha's exercise studio out from under her.
Anxious to get even with Samantha for winning the TV spot, the jealous Debbie sics her own boyfriend, Sporting Life guru Jack Pearson (Walter George Alton) on Samantha.
When Samantha lands a job as an aerobics instructor on the local morning TV show, she enters a bitter rivalry with calculating blonde Debbie (Laura Henry) an aerobic instructor at Samantha's competitor health club, the Sporting Life. The women quickly find an eager audience for pretty single mom Samantha's high-energy classes, but complications to their perfect plan naturally ensue. When they locate an industrial warehouse in a remote part of town, their new careers are launched as owners of Heavenly Bodies.
When the film opens best pals Samantha Blair (Cynthia Dale), KC (Patricia Idlette) and Patty (Pam Henry) are working soulless office jobs and dreaming of the day when they can realize their real dream: to open a mega-jazzercize complex where Samantha will teach. Capitalizing on the phenomenon of the Jennifer Beals aerobics potboiler Flashdance (1983), Heavenly Bodies attempts to ride that aerobics-centric film's coattails and make a buck from the combination of Lycra and gyrating pretty young things. Awash in the leg-warmers and spandex style of mid-Eighties fashion, the Canadian-made cult film Heavenly Bodies (1984) may offer more "dancercize" action than even the most hardcore hard body can stand.