Bowflex PR1000 Home Gym

gannonmail

I am wondering if anyone has thoughts on this (or other Bowflex) systems? I was looking for something with weight stacks because I have bone density issues and am not sure that a resistance system like Bowflex would help as much with that. But, I also heard that if you have had any injuries (tendons, joints, etc) these types if machines are more protective than ones with weight plates. In any event I need something that gives a nonaerobic total body work out to sculpt rather than build muscles and helps with my bone density concerns.
Oh, one more question. How do you adjust the weight you are lifting? I don't really understand the whole 210 lbs. of resistance thing.