I had knee pain and lost fifty pounds. I walked three miles a day and drank a gallon of water a day. I was in a horrible car wreck and within six months, I gained back every pound and my knees are so tight and painful I can't walk without pain in my knees. All I can do is lose the weight again and nothing will make me gain it back.
The appearance of being overweight is nothing compared to the physical pain. This is one lesson I will never forget; it's just so painful.