Just to add my pennies worth on going to the gym- I used to really hate it, hate walking, hated getting hot/ warm/. The idea and fear of everything rubbing and slapping together basically. I was also scared of feeling tired, it feeling hard, feeling I couldn't keep up with my kids/ family/ my feet aching/ not wearing the right clothing. You name it I hated it and after a while of taking every small steps towards being more active I realised I had been so scared but these things weren't actually things to fear of that makes sense. They were stories I was telling myself and I didn't have to keep believing them.
I would never walk the school run, or just to the local shop but by slowly being more active, getting into strength training I just started to conquer some of these fears.
I also noticed how if we were all out for a walk and going up a hill everyone would be out of breath, not just me. Other people also got tired and needed a rest at times. My fear was holding me back so much, making me more inactive as I was spending ages comparing myself to everyone else.
Anyway don't mean to sound evangelical about it as no-one needs preaching to and I'll start to sound like a dick-head, but for me I've become a lot less fearful along this journey and realised how unfounded some of my fears were.
On days where I don't feel so great/ have less energy/ can think of lots of other things I want to do, I think of the exercise like brushing my teeth- I try not to overthink it & just get it done. I also tell myself I'll just do 10 mins but once I'm there I get into it and when I don't do it/ couldn't when recovering from surgery I actually missed it.