I know the feeling well, it happens, it's like going through life with the handbrake on. I've got it on now; I'm off for a Parkrun, it's raining, and I don't want to go.
But all these problems are based in 'thinking'. 'Thinking' is a real bummer. 'Thinking' creates anxiety and aversion and if we get wrapped up in our thinking, we'll believe it's true, and our 'thinking' will control us. It's a bit like my dog, when I throw a stick, my dog has no choice in the matter, he must chase it. We can be a bit like that with the lack of control we experience due to our thinking.
The solution? I find meditation helps with this; though it's far from a quick fix. But over time you can see what thoughts are (they're nothing really) and how they affect us; it kinda takes some of the power out of their sails.
When I wake up and think, "I can't be bothered to work today!", I can realise this is just thinking, and think, "So what? Do it anyway!"
There could be other contribution factors though. When my round was undevloped and underpriced, it was tough going out to do a hard days graft. Now my round is better priced and more compact and I use a van mounted WFP, getting my lazy ass out there isn't as difficult.
I also think there's been some good suggestions made, such as the exercise.