I'm 42 years old and I need to remember that. Although I do not feel 42 all the time, my body occasionally reminds me of my age. This morning, my left hamstring is a little tweaky. I know that's not a word, but sore would be an overstatement, as would saying it's tight. It's just....tweaky. I feel the muscle. Consequently, I decided that a good half hour walk would do me some good. I just finished up a strong half hour walk and was moving it, nothing casual about it. The hamstring didn't get worse, it is the same or maybe a little better.
My point about my age is that, now as an older runner, I have to be smart about my decisions and choices or they may come back to haunt me. I am going to workout this afternoon and normally I would have box jumps, lunges, squats, and other lower body stuff going on. However, since the hamstring is a little tweaky, I may avoid them and choose to go heavy on the upper body. It will depend on how it feels over the next couple hours.
Maintaining fitness and recovery can work simultaneously, you just need a plan.