es, it's effective. I've had the opportunity to test out many sorts of Sissy Squat Machines on the market as a professional athlete who has trained in a variety of small to world-class gyms. The Sissy Squat from Element Fitness is a terrific method to work on your quadriceps from a new perspective. This Sissy Squat machine is both small and heavy-duty, providing a sturdy foundation for any workout. It's made to maintain the lower leg vertical while completing a freestanding squat, which is difficult with a machine.