OK - things started working for me on Friday. Running became just a matter of my two quads alternating at pushing me along. That was on the beach run on Friday night. Saturday morning, I started off a bit tired but picked it up about midway through the run. Then when I heard that I was catching up to a couple of mtn bikers I had seen at the top of the previous downhill, I picked it up and zipped right by them, opening up a minute gap on them in about 5 minutes. Then on Sunday, I got the quads going both on the uphills and flats as well as the downhills. I managed the downhills by bringing my knees farther forward and then popping back and forth on my quads. So ended the week on a good note.