Crunches on a sit-up bench?

Question

what is the correct method for doing crunches on a sit-up bench, also what's the correct way of doing crunches on a mat?

thanks all, I ask because I feel like I've been doing them wrong...

Answer 1

lay on back legs up and hands behind your back go as far as you can 10 at 1st

Answer 2

Working out on a ball makes your muscles work harder.
http://www.hydroxycut.com/WOMEN/WORKOUT/EXERCISES/STOMACH/stomach_swissball_crunch.shtml
If you are on a mat, lifting you legs when you crunch works the bottom of your belly
while doing them with your legs to the side works the side

Answer 3

only one way babe