I really resonate with #1. I definitely get into a depressive funk when I've not exercised in a while.
I loathe actually going to a gym though - driving there, changing, being in a room with all those people, feeling self-conscious the whole time... A few years back I found the book You Are Your Own Gym and started working through the exercises in there. It's great, I can exercise whenever I want in my own basement and I don't need any fancy equipment. I still have a problem being consistent with it, but at least I will actually do it sometimes :)
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