I just started to add them to my core workout and boy are they hammering my back. I dont have the machine but I have been doing it off my weider single bench with a suzzane sommers step up box under the end that I have my legs hanging over. I used 5lb ankle weights for 15 reps and 3 sets. I thought it wouldnt be enough but my lower back isnt as strong as I thought it was. well my question would be how could I add more weight and what set/rep scheme do you guys use for gaining super lower back strength??
I do dead lift occasionslly but I dont know exactly if I am doing it right because I have never been coached on it, so i dont do it as much as I should.