http://www.birthdownload.com/index.php/birthing-ball-exercises Exercising while you are pregnant can also help you significantly during labour. If there's one thing that I would change about my birth experience, it's that I would have worked on my leg muscles much more than I did. During labour your body will tell you to get into positions which enable the quickest and safest birth, some of these positions you may never have spent much time in and certainly for me, I had never tried kneeling or squatting for five hours before. This resulted in severe leg shake during labour and a couple of days where my legs ached more than any other part of my body. I spent the majority of my birth day on a birthing ball so I would have benefited greatly from taking the time out during my pregnancy to do some birthing ball exercises.