Active recovery trumps passive recovery every time.
Examples include waking, cycling, house work, hoovering, gardening, light exercise or mobility training (to name a few).
There is no single best thing to do, but the main thing is to keep moving in the days after training.
You also know from yesterday to keep your food intake high!
I will go into more detail on why this is the case next week. For now you have to trust me.