This reply, by Lorraine Moller to a poster on another site seems appropriate right now.
"Going at it 'more aggressively' sounds some warning bells for me.
Always 'feel' the build-up and let he pace come to you rather than
chasing it. With longer runs there is a rhythm you want to fall into
where pace builds throughout the run quite naturally. I used to begin
20 miles runs at 8 or even 9 minute miles thinking 'how I am going to
get through this?' and end up feeling fantastic with my final miles at
5:50's. But when I tried to run my long runs aggressively I ended up
digging myself into a hole. If you adhere to the prinicples of being
feeling-based and response-regulated in relationship to the purpose of
each workout you cannot go wrong - the results have to come. All
training is a wave of stress and recovery, push and surrender. All push
does not work. Knowing when to push and when to pull back and allow is
the secret"
There are lots of other sites, but few worthy of this esteemed group. Running ahead seems to be the fav spot for former CR addicts, but I haven't visited there for a while.
Most of you are far more experienced at racing than I am, so take this with a grain or two. Having analyzed all of my races to death (I'm a bit of a data freak) I discovered a trend. The best results seemed to come when I started far back, causing me to run slowly for the first km or two. In races where I went out too fast I usually wound up doing very poorly.
The biggest race I've run is Tokyo marathon, last year where there were 25k runners plus another 10k runners in the 10k. It took about 5k to finally feel comfortable with the runners around me, (except for the weird guy with the hat shaped like a Buddhist temple on his head.) such that we were all running around the same pace. Things were significantly better after the 10k point, but the temple guy was in the marathon and going my pace, so I had to put up with the laughs and cheers from the crowd (over 2 million people) for the entire race!
Back home today for a long weekend, in honour of Rememberence Day. (Nov 11) I was out for a 10k run this morning. Temperature was -1C, but it was raining lightly. I did not push it but wound up running 6:30 pace after a 7:30 warmup km. Final 2000 meters was on the track, where I thought of the kids getting ready for their XC meet tomorrow. I hope they all have good runs with PR's. That's a great way to end a season.
I am completely free of any soreness on the right side.....not sure what my problem really was. However for the last few runs I've had a stabbing hot pinlike pain in the middle of my arch on my left foot. It normally comes on after a couple of k's and sticks around for a minute or two before fading into an overall "hot" sensation radiating through my arch. I've had PF before and this is quite different. No problems afterwards or when I wake up.