I just came back from doing Wk5 R1, and I must say that it went pretty well. The only thing that was an issue is that it took me until about halfway through the session before I could get my form right and my rhythm going. I hadn't run in 3 days, and needed to regain my composure. I also was using some new shoe inserts (which my have contributed to my form issues), and must say they were quite helpful in that I did not suffer from the same amount of knee pain.
As far as the stamina went, I didn't have any problems. Since I was so focused on my running mechanics, I didn't realize how much time had passed until Laura spoke up. I usually run a session twice (once going up the trail, and again on the return), and run extra time during the warm-downs and/or warm-ups to get me prepared for the next session's longer run time. Today, I ended up doing it three times, because I was so engrossed in my running form, I forgot to turn around, and was about 2/3 done when I realized it. So, I ran further than I have ever gone before.
I didn't stop at the end of the third five minute run on each session, and kept on all through the warm-down period. This let me have three 10 minute runs. I did have one comic moment though when I saw my shadow on the ground. I thought that I looked like the Little Engine That Could. My arms were pumping like the axles that turn a train's wheels, and I was huffing and puffing steam while trying to pull my big kaboose. All the while thinking, "I can do it, I can do it."
I am so pumped! Two and a half months ago I decided to lead a healthier lifestyle. Since then I have lost 19 pounds, and now can run for 10 minutes without feeling like I am going to collapse. I will be 50 next April, and my goal is Fit at Fifty. This program has helped me to build up my confidence to know that I can overcome the challenges to become more physically fit.