Killer Workout (originally titled Aerobicide) is a 1987 American slasher film written and directed by David A. Prior. It stars 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 Valerie was burned in a tanning salon two years ago. Detective Morgan investigates the gym, after several of its members are brutally murdered by an unknown attacker. (Wikipedia)
https://cinematicdiversions.com/killer-workout-aerobicide-1987-review/
