How do i pinch?

Hey everyone! Today i bought a some body fat calipers and am a little confused as to how much i should pinch.


When i pinch on my stomach, should i grab as much as i can?


or


place my fingers a certain distance apart and then pinch?

There is a huge amount of difference between the two methods.

3-inches apart; then pinch.

Thank man! Now i dont have to feel so fat by grabbing it all. lol