I took glucosamine and chondroitin. I don't know if it made my knees less sore or if they just healed on their own. Carrying a baby around does add stress to the knees, since your weight and the baby's are on the knees. The other thing is, the more padded your shoes are, the more stress gets transferred up the leg to the knee instead of the foot. If you have recently purchased some cushy shoes so your feet feel good, try your older ones to see if your knees feel better.