Today was a gorgeous day in Santa Monica. 72 degrees and sunny, which meant shorts and T-shirt weather. I got out of work pretty much the moment I got there since the X-ray machine broke down and there was no replacement, so I was home before noon! First order of business was to go for a medium-distance fast run to make up a bit for the lost training I had over the last two days due to a minorly sprained ankle.
The workout started out great. I felt good, and was all carbed up. I had only run 3 miles in the past two days, so I was ready to hammer out the pace. I took it fast but reasonable for the first 4 miles (which are downhill), holding near 7:05 per mile, which is my typical pace for a run of this distance on the downhill. Once I got to the flat beachfront, I embarked on my plan to crank out a bunch of 6:50/mile marathon-pace miles, and then slow it down near the end for a total of 15 miles.
Problem is, I couldn't get down to 6:50/mile without blowing up. Actually, 7:05/mile was really killing me - and this time it was the LEGS that were bothering me. My legs are NEVER a problem on runs under 20 miles - it's always the lungs. And this was only on mile 6! I held the aggressive pace for 9 miles, but I knew at that point that the last 6 were going to be ugly.
And ugly was an understatement. Yes, there's a big climb over the final 4 miles of my run, but even factoring that incline in, I was simply spent. I averaged 9:15/mile on those 4 miles, and had to walk a fair bit. And those 9:15 miles were working hard as well, not just pleasure cruising it in.
This workout really was a shocker for me. I could understand one of my prior ugly workouts since I had been injured and sick, but this one I simply had no excuse for. I was healthy, rested, and the conditions were reasonable. I was so angry at the end of the run that I felt like throwing my hydration pack into the middle of the road!
First order of business when I got home was to figure out what the heck happened out there. During those painful last 4 miles, I had already suspected the likely culprit, but I wanted to go over the data a final time to make sure I wasn't missing anything.
Here were my workouts for the last 4 weeks:
10/29-11/4 - 42.6 miles. Strained hamstring and Santa Clarita HM this week.
11/5-11/1 - 75.6 miles, but no speedwork
11/12-11/18 - 64.3 miles. Caught a cold and lost 3 days.
11/19 - 11/25 - 100 miles. Great mileage week, and the only good one of the bunch
11/26 - 12/2 - 65 miles. On call duties took a lot of time, and a surprise interview at Stanford radiology chewed up my weekend.
Total = 346 miles, average = 69 miles per week
The total mileage is 10 miles per week lower than I had desired, but in my opinion, 70 miles a week should be more than plenty to maintain fitness, and is likely more than enough for strong improvement. So plain old miles is probably not the problem here.
I did some excellent speedwork sessions as well during these 5 weeks. In fact, just last week, I ran a fast 10 miler at 6:42/mile on the track, and the week previous to that I ran a 6:55/mile on a marked 12-mile hilly trail near San Francisco. So I was running fast and strong - what was the problem?
Herein lies the culprit. When was my last 21 mile run? The answer is October 28, or over 5 WEEKS ago. I went the entire month of November without a single contiguous run over 15.5 miles. This was a terrible mistake. I had been lulled into the sense of accomplishment by racking up good weekly mileage totals with doubles and smaller sessions, but I made a HUGE mistake by neglecting my "money run" in favor of shorter, speedy runs. I think the elites can get away with this because they routinely run 100+ miles per week, but for my 70 miles per week average, that 20 miler really is THE critical run for the week. My leg fatigue on today's run completely reflected my lack of longer endurance - it was that classic feeling of the beginner marathoner exceeding their distance threshold for the first time. Sore legs, and inability to accelerate after I got past the 10 mile mark.
I'm hoping I can recover whatever losses that I've had during the month of November in the next few weeks by getting in 3 solid 21 mile runs before taper time. I think I will be able to judge my fitness level more accurately after the last of these runs. However, in my current state, I'm speedy at the short stuff, but grossly inadequate after 15 miles. If I had to run a marathon today, I think I would run a 3:30-3:40! Needless to say, I will be struggling to get back to the 3:10 standard, and for all practical purposes as of now, sub3 is completely out of the question, as I could not even hold the 6:50/mile for a single mile today.
Man, this marathon thing is tough. Just when I was starting to feel that the 3:10 was going to be an easy kill, it looks like it's going to be a monster challenge again. Well, let's do it!
UPDATE 12/10/06 Sunday - I just got in that 21 miler today. It was chilly out (42!) and I had to mess with my clothing a bit, but it went surprisingly well. Not a fast one by any means, but including a huge clothing adjustment stop including a complete meltdown of my Garmin 201 (FINALLY time to upgrade!), I made it through the 21 miler at a bit under 8:00/mile and managed to finish the final 5 miles working hard and feeling pretty strong. All is not lost, although sub-3's looking like a MEGA longshot right now. Thanks to all the folks on the commentary board who wished me well!