Need to exhale, bend, lean hands on his knees - it is very important! And just start trying to roll these muscles. In the beginning, will not receive anything! There is no need to fear. My side muscles (if I remember correctly abdominal) did not jerk, not that skate. I did this exercise (or rather tried to do) every morning for 10 minutes. Need 5 sets in each direction (clockwise and counterclockwise), on how much air enough ... 2 weeks, I jerk muscle! A week later again. Then after a few days, then went and traveled in a month I already rolled normally. But now all is doing well. Only need to do every day, otherwise the muscles will atrophy quickly. The main thing to realize that when it fails, it does not mean that the training took place in the shuffle. The brain still sends commands to the muscles when we are trying to activate them, and invisible to us, they begin to grow;)