If your body is achy or sore, guess what?  Sometime the last thing you need is to just sit.  NO!  Get up and move.  Take a walk outside (the sun will provide the vitamin d that is needed for good bone health and mental health) do some squats or maybe see how long you can hold a plank pose.  Take out those hand weights or some large cans from your pantry and work on your biceps. Do you have a gym membership?  Use it!  There are so many ways to get some form of exercise; God created our bodies to move, to work, not to sit all day long.  This will not only help with pain, but your mental health will thank you--oh yes and your waistline!  So come on---get up---quit making excuses.