Recliners are no more harmful to your knees than any other piece of furniture. The only thing that’s bad for your knees is being sedentary which is why you need to get up and move around every couple of hours.
The recliner is a common piece of furniture in many homes, and many health professionals agree that it can be great for your back and posture. The problem is that it can also have a negative effect on your knees. When you sit in a recliner, you tend to sit with your legs splayed out in front of you.