OK, I tried this for the first time today. I usually do roman chair but thought something new might be more stimulating.
First set is 67% of max then 74%, then two at 80%.
I did my first set at 130, then 140, but then I thought I needed 160 to finish up. My stack only goes to 150. The stack next to mine goes to 250, but I can't kneel as it's higher. I tried to do it standing but couldn't crunch it at all at 160. So, I tried it at 150. Didn't feel that tough.
My question is: Should I learn to use lower weight and do them standing?