Per MARADMIN 630/19, The option for planks was implemented into the PFT at OCS along with planks. For some reason my OSO keeps having me do planks for my inventory PFTs, stating that OCS is moving away from the crunches and more towards Planks. Is this true? Currently I can hold up to 3:00- 3:30 but can max crunches easily and it affects my score significantly. If anyone from recent OCS classes can shed some light on this I would be very appreciative. Is there a reason why he keeps having me do planks?