Step Into Shape! Step aerobics is one of the best ways to get great muscle toning and cardiovascular conditioning at the same time. It works all the leg muscles AND burns fat throughout the body. This "Buns Of Steel Step Workout" was designed by Lynne Brick, R.N., a pioneer of step aerobics. The moves are new and exciting, yet easy to follow. You'll go from one combination to the next so effortlessly, you won't even feel like you're exercising. You'll just be having FUN! Lynne Brick, R.N. was voted IDEA's Fitness Instructor of the Year in 1990. In addition to IDEA, she is also certified by ACE and AFAA and trains fitness instructors all over the world.