This is so cool!!! I think we do have a good thing I am really excited.
For Ahnniewantstorun, You will get so much advise here and that is a GREAT thing, it may not always be the same, take what works for you and go with it. From my experience if the schedule calls for 3 days a week I wouldn't do more than that. There is a reason the schedule is made up the way it is. Why run 20 minutes and then decrease,? It I think it is because you will learn that the mind is stronger than the body. The high you will get from running 20 min for the first time is so cool. They say if you think you can run 5 minutes you can do 10 minutes. You are buiilding strength in muscle and bone. Running is jarring and you need one day of rest between runs. You can walk if you want but take it easy. One of the biggest mistakes newbies make is getting excited and overdoing it. Take your time, enjoy the ride.
I also was given advise from someone else and like to pass this on "To run farter you must run slower, to run faster you must run farther" It is so so true. So keep up the good work.
Now about my run, well it turned out to be more of a walk...I have had a terrible head cold and just can't breathe, every step my head was pounding. Listen to your body, twinges and so forth are probably OK but there is no reason to kill your self. I am disappointed in myself but I know I will fill better tomorrow, and plan on being caught up by the weekend. I like to do 2 runs during work week and then satureday. I will get out there Tue, Thur and Sunday.
Nyquil is kicking in gotta run and I hope this made sense in my cold medicine stupor.