I've been thinking about my run yesterday, and I think it was likely a tempo run. I normally take two steps per breath, two steps in and two steps out. Yesterday, during my 2nd and 3rd laps, I was taking one step per breath for almost the whole mile. I have a very large chest, and I assume that means I have a large lung-capacity. My 40-year-old son and I were comparing our chests one day, and mine is twice as thick as his. My normal running cadence is about 180, but my cadence during the run, hence the number of breaths per minute, was probably close to 190. I was taking deep breaths, and I used lots of oxygen.
I've been hoping that the adrenaline factor of the race plus a 25 degree (F) lower temperature during the race would let me run close to a 9 minute pace during the 5K race in two weeks. However, based on yesterdays results, those factors may just help me continue a 9:30 pace for the full 3.1 miles instead of for 1 mile. We'll see.
Too bad I didn't have my heart rate monitor on yesterday. It would be interesting to see how high my heart rate went. Maybe I need to trade my Garmin 101 for a 301 :)
Well, back to bed. I woke up from my sleep thinking about this...