For a start you might check that you are dancing from foot to foot and not with your weight on neither one foot or the other( but stuck in-between ). Practice Rumba Walks to music on your own using the correct technique is vital. Examples of this can easily be found on the inter- net. How long do we need to practice Rumba Walks. To quote former World Champion Karen Hardy. Fore ever. Also have your posture checked by somebody who does know what posture is. Example stretch your upper body up, and your lower body down creating a longer spine. Do not sink into your haunches