• 11 months ago
Killer Workout (originally titled Aerobicide)[1] is a 1987 American slasher film written and directed by David A. Prior, and starring Marcia Karr, David James Campbell, Fritz Matthews, Ted Prior, and Teresa Van der Woude. The story revolves around a Los Angeles fitness club owned by Rhonda Johnson, whose twin sister burned in a tanning salon five years ago. Detective Morgan begins to investigate the gym, after several of its members are brutally murdered by an unknown attacker.

Plot
A young model, Valerie, is burned in a tanning salon accident. Five years later, Valerie's twin sister Rhonda Johnson is operating a fitness club in Los Angeles. Rhonda chastises one of her employees, Jaimy, for missing an aerobics class she was supposed to lead. Shortly after, a killer brandishing a large safety pin enters the women's locker room and slashes Rachael, a client, to death. While closing the club, Jaimy finds her corpse stuffed in a locker, as well as a blood-soaked knitting needle in the locker of Diane Matthews. Detective Morgan is assigned to the murder case and questions Rhonda and Jaimy.

The next day, Chuck is unexpectedly hired by Rhonda's senior managing partner of the club. Chuck gets into a physical fight with patron Jimmy, which impresses club patron Debbie, Jimmy's ex-girlfriend. Later, Morgan learns that Diane's knitting needle was not the weapon used to kill Rachael. Later that night, a group of teenagers vandalize the club with spray paint, only to be brutally murdered by an unseen assailant.

The next day, Tom, a club patron whom Morgan has deemed a suspect, is murdered in the locker room, and later, Jaimy is found hanged inside the club. Rhonda harangues Morgan for her perceived ineffectiveness of his investigation. Morgan uncovers that Rhonda is in fact Valerie, who survived the tanning accident, and that she never had a twin sister—instead, she legally changed her name to Rhonda and has kept her badly-scarred body hidden with clothing and a wig. Morgan confronts Rhonda with his discovery, and she admits it, but remains stern and impervious to his assertion that she may be the murderer, killing out of jealousy.

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