Does anyone else have this problem? How do you deal with it?

I’ve found that if I jump on the rebounder or elliptical for half an hour I warm up for an hour or two afterwards. After Christmas, I plan to experiment a lot more with the effect of different kinds of exercise, but right now I have a million things to do and can’t devote the effort. Is there something I should be supplementing or eating that’ll help? I’ve googled enough to conclude (perhaps incorrectly) that my reverse T3 is high. I know if I up my carbs that I’ll warm right up, but I really don’t want to do that - most days my carbs are in the zero to twenty range.

I appreciate any thoughts or experiences. Thanks.