if you work as a courier or similar job where you're almost always on the move, do you have the stamina to stretch and do yoga after your shift?

I work as a courier in 2 shifts: morning and afternoon.

If I have an afternoon shift I can do some jogging, stretching and my yoga routine before working, something that I notice makes me feel better. If I have a morning shift, I usually eat at the job, meaning afterwards I won't feel motivated to do any of my routines (full up), but on these days I feel strange, like something's missing.

I'm not the kind of person that eats small portions, I eat till full up.

I don't know what a solution looks like