yeah but this study showed and proved you could greatly improve aerobic fitness levels through circuit training
Sure, I would agree you could to an extent.
AJ didn't invent circuit training of course but the Nautilus machine setup would make it easier to do.
All you had to buy were around $40-50k worth of his machines.
Or you could get a few barbells and do a few select exercises. Cost under a grand.
Or do pushups, squats, and pullups for 20 minutes straight. Most gyms or outdoor exercise areas in the Army have a pull-up bar so it don't cost nuttin'.
No, instead, spend $40-50k of the taxpayers money on Nautilus machines.