1) Dead 2) Doing nothing 3) Enjoying a breather 4) Having no kinetic energy 5) Idle 6) Immobile 7) Inert 8) Like lowered heart rates 9) Lying calmly 10) Motionless 11) Napping 12) Not active 13) Not in motion 14) Not moving 15) On a break 16) On a chaise lounge 17) Quiescent 18) Reclining 19) Recumbent Found on https://www.crosswordclues.com/clue/at-rest