Ranger Challenge run early in the morning. The cadets were doing a 5 K tempo on the track. I decided to run with them until there were 3 laps left, and then do a max HR test. Their target was about 6:00 pace. I figured to avoid a mess I'd let Ted do the pacing and hid away in the pack. Stayed on the outside of the first lane, but not quite in the second. We were asleep on the first two laps, surged a bit on the third to make up, then settled into a good pace - 1:28 per lap. The two faster cadets (it is about time for me to learn their names) were handling it well. Once we settled into pace, HR stayed steady around 150. There was a headwind on the home stretch. It was nice to have Ted and a big cadet deal with it. With three and a half laps to go, moved out to get ready for the max HR test. The surge, the anticipation, and the headwind combined brought HR up to 157.
Then the last 3 laps fast trying to push HR to the max. 5 K pace or a bit faster sustained for long enough is sufficient for the task, and in fact will do a better job than an all out push. First two laps in 2:35.4 at about even pace. Messed up on the split after the first fast lap, hit the button about 1 second early (got 1:16.4), but still good enough to take average HR. On the first fast lap average HR was 162, on the second 166. Pushed a bit harder on the last lap, got 1:15.4. HR maxed at 170, and averaged at 169 on the last lap. 3:50.8 for the last 1200, and 17:58.9 for the 5 K.
Did not like the headwind on the home stretch. It messed with my concentration. Also did not like running alone and hard. I liked running easy and in the pack a lot better.
It seems like once HR goes past 160 every extra beat per minute takes me to a whole new level of pain. 160 is comfortable enough to hold for 15 miles. 163 can be sustained for 10 miles. 166 hurts bad enough to be a 10 K pace. And 170 is so painful that I do not think I can sustain it for the entire 5 K. I wonder if practicing sustaining max HR for longer (3x2000 with the goal of maxing it out after 800 and holding it, but avoiding anaerobic running as much as possible) could either push max HR up a bit, or at least make it possible to hold it for the whole 5 K. I do not to expect to gain very much from this, maybe 20 seconds. But that means extra circuit points, plus a few bucks of prize money, which does add up. It could also make surging easier in longer races, and maybe even improve the overall pace a bit too.
Ran with the kids in the evening.