While training in Thailand, I also got to rest on some days — my resting days were spent on slightly lighter training sessions. On these lighter training days I got to try the Flyboard for the first time, which lets you fly above water. I also got to try out a flight simulator.
For me, resting is moving, and discovering new things. Many people go on vacations to foreign countries to rest, but one could also go there to discover new places, gain new experiences. You can rest in Estonia, or simply take some time to relax.