If Sit Ups Hurt Your Lower Back

Here are two options. First, crunches, said to be safe for lower backs, while still delivering "six pack abs." 

Not surprisingly, this gentleman's abs and mine are very similar after my fifty sit ups the other day. 

And, for those of you still pained by crunches. There's always this technique for getting six pack abs. I think I could do this. I think I could.