Time Trial Meltdown!

Today I ran a 5k time trial at the track. I've been bothered by the nagging feeling that I'm training at the wrong paces. That's because I've been using a VDOT (and associated training paces) based on my best 10k performance from two years ago. Thus, I could really use a current, up-to-date measure of my fitness.

I warmed up with around 2 miles of easy running, plus a few 100-meter strides. The day was cool and sunny, but there were also some gusty winds to make conditions less than perfect. After lots of procrastination, I finally started my 12.5 laps of pain.

The plan was to break the run into twenty-five 200-meter segments. If I could average slightly under 48 seconds per 200, I'd break 20 minutes in the 5k. This would be a new personal record for me (my best was 20:00 from four years ago). Ideally, I would finish in 19:45 or slightly faster. This would justify my current VDOT estimate of 51, from which all my recent training paces have been based.

In order to get to 19:45, I planned to run the first 10 segments in 48 seconds each, and the final 15 in 47 seconds each. I figured that would prevent me from going out too fast, while also preventing me from losing too much time in the first half. It was also a plan based on one big assumption -- that I actually could run that fast right now.

The first laps started off well enough. The pace felt hard, and I admit it wasn't long before I began to wonder if I could hold it for 12.5 laps around the track. Still, I was hitting my splits right on the money. The first warning came at 1800 meters, when I was a full second off my 200m split target. I chalked that up to a lack of concentration, and ran the next kilometer in 3:59, just under pace. By this point, I could tell that just breaking 20 minutes would be enough of a challenge, not to mention 19:45.

Nearing the 3-kilometer mark, the effort to maintain pace suddenly shot up. My breathing went from a 2-2 pattern (breathe in for two steps, breathe out for two steps) to a 1-1 pattern, practically hyperventilating. I knew I was way over my lactate threshold, and I still had 2 km to go. I held out to the 3-km mark, but it was too fast. Seconds after that, I got the worst side stitch I've ever had. I was reduced to a painful walk for the next half lap, and then could only manage to jog it in to the finish. My total time was a disappointing 22:26.

Here are my splits:

Meters	Split	Goal Pace	200m Lap	1000m Lap
200	0:47.0	0:48	47.0
400	1:35.2	1:36	48.2
600	2:23.5	2:24	48.3
800	3:11.3	3:12	47.8
1000	3:59.6	4:00	48.3	3:59.6
1200	4:47.6	4:48	48.0
1400	5:36.1	5:36	48.5
1600	6:23.6	6:24	47.5
1800	7:12.7	7:12	49.1
2000	8:00.3	8:00	47.6	4:00.7
2200	8:48.2	8:48	47.9
2400	9:35.8	9:36	47.6
2600	10:23.6	10:24	47.8
2800	11:11.9	11:12	48.3
3000	12:02.2	12:00	50.3	4:01.9
3200	14:15.7	12:48	2:13.5
3400	15:17.5	13:36	1:01.8
3600	16:12.2	14:24	54.7
3800	17:06.6	15:12	54.4
4000	17:58.7	16:00	52.1	5:56.5
4200	18:51.5	16:48	52.8
4400	19:46.3	17:36	54.8
4600	20:38.0	18:24	51.7
4800	21:32.1	19:12	54.1
5000	22:26.1	20:00	54.0	4:27.5

As you can see, things started to break down at 3000 meters, and disintegrated immediately after.

What did I learn from this painful experience? The whole point of running this time trial was to assess my fitness, but I'm not even sure I did a good job of that. Trying to hit an arbitrary goal of sub-20 definitely hurt my chances of running my best 5k on this particular day. I was more worried about hitting every 200 on 48 seconds, and paying less attention to my perceived effort. The signs were all there (that this pace wasn't sustainable), but I ignored them. So, this wasn't a good test of my current best 5k ability.

I think the effort was a better test of my 3k ability, since I don't imagine I could have run a 3k much faster than today's time of 12:02. Plugging this into the VDOT calculator, I get a new VDOT of 48. That's quite a difference from the VDOT of 51 on which I've been basing all my recent training paces!

Should I use this VDOT from now on (at least until my next real race)? I've gotten some feedback on the CoolRunning boards saying if I can run 3-4 kilometers at 4-minutes per km on the track, solo, then I should be able to run sub-20 in a 5k race. I don't know. Perhaps they are right, but it sure didn't feel like I could have done it today, race or not.

For now, I think I'll just take my medicine and use the slower training paces designated by a 48 VDOT. That means my Easy/Long pace is now 8:31 mpm (it was 8:07 using a 51 VDOT). Threshold runs are now at 7:02 (instead of 6:44). 1000-meter intervals are at 4:03 (formerly 3:51), and 400-meter reps should now be run in 90 seconds instead of 86. I feel like I've been demoted, but in reality I have to admit that I'm just not in as good of shape as I thought.

The other, and perhaps most important, thing I learned was what it feels like to "blow up." I've never done that before, in a race or otherwise. Always when I'm approaching that feeling in a race, I've eased off a bit. That leaves me wondering if I could have pushed "just a little bit harder" and finished a little bit faster. Today I didn't back off the pace, because I was trying to hit my splits. I am going to try to remember exactly what this felt like, because I think it's a useful thing to know. After all, how will I know how hard I can push unless I've experienced pushing too hard in the past?

Well, now I have.