Is this not hardcore? 

Performing knee bends with a metal headdress weighted down with sandbags on each side is quite the workout.  Do you agree? This quirky, quintessential Pilates apparatus challenges balance, develops proper body placement/alignment, works the thighs and buttocks, fosters focus and ensures graceful movement.  It's all things Pilates.  Executing this movement is no easy feat. It cannot be done without a strong Powerhouse (the Pilates term for the core).  This is an original design and another example of the genius of the Joseph Pilates.