I've lost 37.8 lbs!!

I have lost 37.8 lbs since I started by portion control diet. I noticed that knees don't hurt or get swollen. I'm walking and moving faster. I feel much better and I have more energy. I suspect two reasons, the first is that I'm carrying around less weight. The second is that last week I when to the emergency room with a heart problem, I have Congestive Heart Failure. My heart is enlarged and had fluid around it. The doctors fixed me up and I'm working on fixing that problem. I now trike for knees and heart.