Sit Ups/Curl Ups - lie flat on the ground with knees bent at a 90-120 degree angle. Fold arms flat across your upper chest or shoulders. Have a partner hold your feet. Note your feet may not be placed under an immovable object. Curl up touching elbows to upper thighs keeping your hands in contact with your chest at all times. Lie back touching the lower edge of your shoulder blades to the deck and repeat. Buttocks must remain in contact with the floor at all times. Repeat as many times as possible in two minutes.