REST DAY.

WHAT IS A REST DAY WELL FOR ME ITS  NOT DOING ANY TRAINING IN WEIGHTS OR GYM OR KARATE.WHY TO LET MY BODY REST AS I AM GETTING A BIT OLDER THESE  DAYS AND NEED TO REFOCUS MIND AND BODY.WHAT DO YOU DO -WATCH CATCH UP TELEVISION OR PLAY ON PLAYSTATION-TRYING TO GET BACK INTO GAMING BUT HARD AS DIFFERENT CONTROLS THESE DAYS AND OF COURSE SPEND TIME WITH MY WIFE.