Oh boy, I really didn't want to walk today - I woke up with such a stiff and sore back I couldn't even stand up straight without putting on a back support. Even anti inflammatories didn't work! But I couldn't get the thought of "if you don't use it, you lose it" out of my head, so I bit the bullet and went out. I couldn't find the energy to get the speed up to brisk walk, so I did a slow 3500 steps and felt I'd really achieved something when I got back! And best of all, I'm still in pain, but no worse than it started out - it actually may be a little relieved!