Christine helped me strengthen my right knee that has arthritis. I can walk a lot better my limp has improved I only use the walker when I am not home now. And Christine taught me the right way to use the walker/ rollator. She helped my body get better balance on both legs now. I am so grateful for Orlin and Cohen for my orthopedic doctor Dr. Lippe and Christine. Thank you so much. Keep up the great work everyone. Hugs