Swedish HurtfriskOverly lively, bouncy, and athletic. Think a middle-aged aerobics trainer in short shorts with a wide smile on his face training a bunch of unwilling kids.

https://sv.wiktionary.org/wiki/hurtfrisk *Hurtig* means something like athletic/full of energy and endurance (looks like German has this too). *FlÄshurtig* (pant-*hurtig*, as in so *hurtig* that you start to pant) is a synonym.