I've had a knee replacement ten years ago and apart from the odd twinge it's still going strong and pain free. Meanwhile the other knee is a killer but if I take Naproxin (NSAID) I get gut issues. I've done/am doing everything to strengthen the muscles supporting the knees including four weeks of physio classes, which helped. However, I recently started on Turmeric capsules and lo and behold, walked 3500 steps with my dog this morning, reasonably pain free! Got myself a Fit Bit so I know exactly how far I walk each day. Turmeric might be the way to go but you need to take it regularly. Physio advised me "little and often" to build muscle strength. Take short walks and build them up. Make it part of your routine. Housework and walking around the house isn't quite the same. Mind over matter helps too! I will not give in. I dread the prospect of being a shuffling old woman!