This late entry in the slasher genre lacks plausibility (the corspes keep on piling in the aerobics studio but it stays open!), suspense, and memorable kills (apart from the opening freak accident), though the aerobics sequences are sufficiently motivating (in one way or another....), Marcia Karr stands head & shoulders above the rest acting-wise, and the ending is unusual enough to earn the movie a whole extra star => ** out of 4.