It's amazing how we often times don't have the desire or energy to move our bodies, even though we know it helps us feel better.
As for me, I was having that issue a bit, and finally got moving again - and boom, there's the energy. It's hard to feel inspired to move when you're tired and yet if you make the effort, you aren't so tired anymore. I know this in my brain, but it doesn't always translate to my "want" at the moment.
I'm back to running again and lifting weights. I am thrilled to be moving again. I always feel so much better. Now, if I could ingrain this in me for those moments when "I just don't feel like it".