These are great for strengthening your deep core muscles (pelvic floor and transverse abdominals). While on your knees, bend over and stretch your arms out over an exercise ball. Engage your pelvic floor (i.e. do a kegel) and give your baby a little hug before you start moving. As you begin to roll forward, articulate your spine. Tucking your chin, try to press your back towards the ceiling as best you can (your range of motion will get smaller as your belly gets bigger). Once you are parallel to the floor, let your belly relax a little (this feels great to stretch your tight skin and muscles). Next, engage your deep core muscles (i.e. do a kegel and hug your baby) prior to straightening out your back. Repeat this exercise as many times as you’d like, but do at least five reps.