When working in a kneeling position, there is constant pressure on your knees. However, your knee is generally not very capable to withstand this stress, which means damage can occur in the long run. Recovery often takes a long time and damage could be permanent. Working on your haunches is not healthy either, as this stretches the knee ligaments. Knee and back problems can be prevented by wearing good knee protectors, as these offer the right support for your activities.