Marathon Monday

I went out for a walk today and wore my heart monitor and felt like I was going to walk and run for 2 miles.  I would watch my heart rate go up and down and judge the running time and walking time according to the heart rate beats per minute.  However, when I got started I got busy watching the bpm and the time it took for it to go out of range and back into range.  I did my walk/jog in about 25 minutes and I felt pretty good, so I went around again!  Another 2 miles, only this time I did 1 minute of walking and 1 minute of jogging staying strictly to that schedule.  Total distance was 4 miles and it took about 45 minutes.