My left foot is feeling "weaker" and is becoming painful

In past posts, I've mentioned that my left foot felt "weak" after long runs. That condition is getting worse. The "weak" feeling starts at about 8 miles, and by 10 miles, my foot is starting to feel sore. As soon as I stop running, the pain stops. Right now, it has been about three hours since I finished my two-hour run, and my foot feels fine.

I don't think my foot is injured, because the "weak" feeling is like the feeling I used to have in my feet after several hours of yard work. In fact, that "weak" feeling and soreness was the reason I started running. I think the problem is due to the fact that it has only been a year and a quarter since I went past 10 miles and on to 15 and then back to 13 miles. During that time, I've done a lot of fast runs and speed training. I think my body just needs more time to build strength.

I am concerned about the half-marathon on April 21, because if my two-hour runs last week and today are indicators, I would have a hard time finishing the race. I'm going to wear an Ace bandage on my foot for the long runs between now and the race (including the race). After the race, I will need a month for recovery, and during that time I will just run comfortable runs with no speed work. Then I'll just have to run the summer and fall by "ear" so to speak.