Storyboard0.swf1.36363629.970000029970Storyboard0.wmvSpine is rounded and bent at the upper part of the spine, butt is tucked underneath, belt line is parallel to floor Bad posture!!Spin is straighter and bent at the hips, knees are slightly flexed, belt line is pointed at the angle as the shaft plane -- great posture!Spine is rounded and bent at the upper part of the spine, butt is tucked underneath, belt line is parallel to floor Bad posture!!Spin is straighter and bent at the hips, knees are slightly flexed, belt line is pointed at the angle as the shaft plane -- great posture!