Summary: back of your head pressing against the mat Continue to exhale as you tuck your pelvic area up The lower part of your seat lifts from the mat as your spine presses the mat 2 Trunk Curl Trunk curl is a very simple stomach exercise All you need to do to perform the trunk curl is to get in the proper position as illustrated in the picture doing short crunches as you can see
Image Dimensions: 392 x 222
Image originally found here.