Can someone straighten something out for me. Myself and a mate were practing our sit ups/ press ups etc when we came onto the topic of the 'form' of an army sit up. Now, he thinks that once you have 'sat up' you them only need to lower yourself back e.g. only mid/lower back touches the floor. I disagree and thought your shoulders have to touch the mat in order for it to be counted as a full sit up. Any PTI's on here to tell us we're both wrong?!