If possible use a power stretcher instead of a knee kicker. Carpet installers can potentially suffer from skin infections, acute knee injuries, fluid buildup and bursitis. Installers spend a great deal of time on their knees and should use knee pads to reduce knee strain. Mini-breaks (a few seconds) can help refresh tired muscles and joints. Select knee pads that are comfortable and do not reduce circulation. Try to test knee pads for comfort and fit in kneeling and standing positions before purchasing.