When I do crunches or anything similar, my neck hurts. How could I stop that?
Here is a simple fix to your problem, take you fist and put it under your jaw and the other hand should be behind your head.
I get that from regular crunches but not from bicycle crunches
I know for me it's from too much tension curling my neck, I don't pull from behind my head or anything, even tho I know it I still get it. I prefer bicycle crunches anyway though.