Yesterday on my walk I decided to try to jog some intervals. I don't know why -- I am still 190+ and haven't done more than a fast walk since I was about 12 (I'm 42 now). Maybe it was inspiration from the Olympics ...
So, making sure I was on a quiet dead-end street where the residents hadn't yet gotten home from work (don't want to look like a fool, dontcha know), I jogged from a trash can to a light pole, about 20 feet up hill. Hooray! I did 4 more intervals, each about 30 seconds, during my 2.4m walk. I couldn't believe it. Me. Jogging. Wonders never cease.
I have awful awful held-together-by-a-wish knees, so running is not something I'll ever be able to do. But, it's good to know I can handle a few intervals now and then ...