Relaxed

According to the Shorter Oxford English Dictionary, when referring to the physiological definition of the word 'relaxation' it defines it as 'the loss of tension in a part of the body, spec. in a muscle when it ceases to contract; the state of a resting muscle.'  
Ziggy practices this regularly, particularly if he finds a comfortable, sunny spot as is ably demonstrated here.  He seems fond of hanging limbs and his tail over the edge of chairs or, in this, case, the bed.
I think we can all take a lesson in the art of relaxation from a cat.