Another transitioner here.
I wear my hair in a bun everyday so I don't do anything special when I go to the gym. When I get home, I take my hair down and let it dry out and then twist it back up when time to go to bed.
I don't co-wash or shampoo everyday though. That's too much manipulation for me. I typically co-wash or cleanse 2-3 a week (to cleanse product build up) and DC 1x a week.
Since being a Raw Foodist for almost 3 years, my sweat isn't foul or funky, so I'm not rushing to rinse or wash my hair after working out which I do practically everyday.