Have a rest (A2)

The doctor’s advice to have a rest every twenty minutes seemed impossible to follow.

Relax (B1)

Living in the countryside gives you the opportunity to relax on the fresh air.

Chill out (B2)

While his classmates were studying hard for the upcoming exam, he was chilling out on a deckchair under a tree.

Unwind (C1)

After having finished the painting, he put aside his oils and finally allowed himself to unwind.

Recharge batteries (C2)

As far as doctors concerned, yoga being done in a serene and peaceful place is the best outdoor recreation for recharging one’s batteries.