So I've been keeping up with the routine I began last week.
Before breakfast I am currently up to:
30 standard pushups
25 regular crunches
15 reverse crunches
walk in place while brushing teeth
Varies during lunch (squats, toe lifts, cherrypickers, butterflies, overhead claps, and a variety of stretches).
M/W/F is walk/jog or other cardio, depending on weather. I started out last week with a fast walk and timed in at 17 minutes 50 seconds. Next outing was walking fast for a count of 50 and then jogging for a count of 15, and timed in at 16 minutes 20 seconds. Next time did the same walk/jog and came in at 16 minutes.
Today I started out jogging lightly and mostly jogged. There were a couple of times where I had to slow to a fast walk and then picked back up with the jogging (note: I am not experiencing any pain or discomfort in any joints or muscles, none in my feet, and no cramps or side stiches - the main reason I have to take a break is for breathing - I developed exercise-induced asthma about 9 years ago and am slowly reclaiming my lungs). Came in at 15 minutes 50 seconds.
That means that in just over a week I have shaved two whole minutes off my time!!! It's still not an outstanding time, but I am encouraged by the improvement.