I dealt with lack of motivation when I was heavier. My joints and muscles ached and I felt like sleeping all the time. The only thing that got me motivated was to walk somewhere beautiful or somewhere that I could focus on anything except how bad I was feeling like a festival. I also did gardening and yard work. I was really sore the next day, but seeing the positive results were motivating to me. I hope you find something that helps.

Prior to May, I was in severe pain and could barely do 10-15 min walk in but I just kept trying. I was soooooooooooooooo tired all the time that I could barely function. I felt like I had no life, my kids are both really active in sports and I work full time plus I was taking a full load of college courses. One day I realized it was going to be up to me to deal with it and make some different decisions. I began to carefully look at the foods I was eating (tons of crap) and I began to exercise. Yes I was tired and in pain and if I could only do 10 minutes then it was 10 minutes. I just kept trying every night do do something, anything. After about 2 weeks I really had made progress and I spent the summer swimming and riding my bike because those hurt less than walking. Please evaluate your foods, your medications (are you on the right one that works best for you?) and just do whatever you can to move even if it's only for a few minutes. I still have pain in my back but hardly any in my knees and none in my feet anymore. I've lost over 60lbs and I physically and mentally have never felt better. Last but not least reach out to your support group (family, friends, peeps on MFP). We are here for you!