What is the appropriate crunch form? Last time I did a PFT the MSgt. had me fold my arms across the bottom of my stomach and touch my forearm to my thigh. My OSO (wasn't there when I did the PFT) had told me to cross my arms with my hands under my armpits and my elbows touch my thighs (like the navy does). Which is correct? Are both acceptable? I just want to train the same way I will have to do it in reality.