Fubar:

Glad you are ok. Are you still seeing Tweety birds?!
Ned: first off

for Enduro (not your accident). Regarding your knee, my best guess is
chondromalacia which is often referred to as "Runner's Knee." I used to have it pretty frequently, but :knocksonwood: haven't had it in more than three years. I take glucosamine chondroitin virtually every day, which seems to have stopped me from getting it. You likely have overworked your knees, and are over pronating a bit when you run. Rest will fix it for now, but to keep it away, you'll need shoes that reduce pronation (usually called "stability" shoes), and should work on balance in your muscle groups in your legs. Runner's hamstrings are often too tight which can contribute to many leg/knee/foot problems. To check how tight your hamstrings are, lie on your back, and
do this stretch. My Doc (Sports Dr.), says if as runners we can't get to perpendicular, we likely shouldn't be running as we are time bomb for leg injuries. Running unfortunately tightens these muscles via imbalance.
Norman: Getting three more miles in is awesome. Each time you get out there you WILL get stronger. Give it time.
Darrin: AWESOME run!
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My Update:
I got in my 6th workout through day 6. Today was a 41 mile bike ride (fairly hilly and LOTS of frick'n chip seal). My legs were pretty tired from yesterday's brick so I didn't expect too much. Through mile 20 I was averaging just over 21.0 MPH, which is when my legs started to let me know they weren't too excited about pushing the next 20+. I slowed down a bit, and finished the last 21 around 20.2 MPH. Overall I ended up averaging 20.6 MPH, had an average HR of 156 (very low for me), and a HR max of 171 (also low!). My heart seems to be ready to drop the hammer, while my legs just don't have the power right now to make it happen.
Tomorrow is supposed to be a speed workout (6x 800's), but I'm going to do a steady hill run instead, as three quality workouts in three days is asking for an injury on my old legs.