My bed my home, my desk my office, my life !!

I hope the title is self explanatory, most of the part of my life has been confined to just two small sections in the world, my bed in home and my desk in office. The moment I enter office, most of the time just passes away sitting at desk, looking at monitor, clicking the mouse, typing something, attending conference calls, calling people. Same way when I come back to home most of the time just passes on bed, sleeping, sleeping and sleeping or resting, resting and resting. My body seems to have become quite fragile compared to what it used to be, I cant climb down 6 floors without feeling exhausted, which used to be a task I could have done dozens of time a couple of years back. I cant remember a single 10 digit phone number anymore (except the one which I use to order from nearby restaurant). Are these signs that I am getting old? I hope not.

So what can I do to change few of these things? Well, as of now I can't think of many practical solutions.