A.M. Ran with Jeff and Daniel. Jeff was a lab rat today. He is such a nice rat, always agrees to participate in experiments and measurements. I put my HRM on him and watched his HR at different speeds. It was a lot of fun. At 8:00 pace he was roughly around 130. He wanted to see what happens when he held his breath. His HR did not go up at all, but he just could not keep running while holding his breath. Then I suggested that he should sing. With the Independence Day approaching he sang the first verse of the Star Spangled Banner at 8:00 pace. His HR maxed out at 144. Then he remembered that in his PE class he could get his HR from standing (around 75-80) to 160 in 50 meters of sprinting. I wondered if he really could. So at first he sprinted from 8:00 pace, but the problem was that he went so fast I could not keep up and he moved out of the HRM reception range. Noting that mistake I gave him the watch, and next time we tried from a resting start. We tried to wait for his HR to drop to 85, but there were too many mosquitoes. Daniel and I jogged around, while Jeff stood and sacrificed in the name of science. However, the mosquitoes kept him agitated enough that his HR would not drop below 100. So we decided that was as good as it was going to get and he busted out sprinting. After 15 seconds he was able to get his HR to 159.
Then we decided to measure his HR at 7:00 pace. It was around 150. Afterwards we tried at 5:50 pace. It got up to 172. We dropped Daniel off, and decided to try at 5:20 pace. Well, Jeff was too feisty to run 5:20 and started out at 5:00 pace. So we ran a mile in 4:58. Jeff's HR got up to 187. This was the fastest mile I've ever run wearing Five Fingers. I liked that mile a lot better than the one we did a couple of weeks ago in 4:55 because it did not have a 70 second quarter in the middle. The pacing was perfectly even. We estimate that Jeff's max HR is around 190-192.
Dropped Jeff off after 13 and ran 2 more. Total of 15 miles in 1:54:56.
P.M. Home to Costco relay. 1.06 with Julia in 11:13, 1.55 with Jenny in 13:43, and 2.77 with Benjamin in 22:04.