When in doubt, try a cheap experiment.

Make a list of various forms of recreation, then do one of them for some amount of time whenever you feel the need to take a break. Afterwards, note how well-rested you feel and how long you performed the activity. It shouldn't take many repetitions before you start to notice trends you can make use of.

Although to be honest, the only conclusive thing I've learned from trying that is that there's a large gap between "feeling rested" and "feeling ready to get back to work on something productive".