Run 627: The fourth km blitz

Run 627
Average pace: 5:26/km
Location: Brunette River
Start: 6:07 pm
Distance: 5.03 km
Time: 27:22
Weather: Sunny
Temp: 22ºC
Humidity: 47%
Wind: light
BPM: 155
Weight: 164.5 pounds
Total distance to date: 4715 km
Devices: Apple Watch Series 2, iPhone 8
Shoes: Saucony Switchback ISO (70 km)

On the way to the start of tonight’s run I was thinking about how sometimes I’ll feel tired before a run and then go on to turn in a good performance, and other times the run will reflect that same sluggish level of energy. The latter actually doesn’t happen that often and I kept that in mind as I got ready, as I was not feeling super-invigorated.

It turned out I was secretly super-invigorated because I ended up turning out my fastest run of the year, finishing with a pace of 5:26/km. A large part of this came about due to a burst of speed in the fourth km, something I’ve noticed happening in several other runs recently, as if I’m catching my second wind or finding the perfect stride right around that 20 minute mark. In this case my fourth km was a blazing 5:04/km, the closest I’ve come to breaking the five-minute mark this year. And I emphasize that I was not trying to do this, I just felt good and kept the pace up (or increasing it, as it turned out).

I didn’t really push at all until the last stretch and by then I was slowing, with my pace dropping to 5:22/km. But it was the only time I felt even a little burn–and it was little. The rest of the run there were times where I felt genuinely light on my feet, as if I’d found that perfect rhythm or zone. My mind bounced over a succession of topics and in this case, a wandering mind is a sign of a good run.

My BPM was also low at 155. The conditions helped, too, as it was warm but far from hot after yesterday’s rain, and the sun was low, so I only got a few minutes of it. Humidity was reasonable, so sweating wasn’t excessive and I never felt dehydrated.

I’m surprised and kind of delighted by how well the run felt. The next one will be at the lake and I suspect it will not feel as effortless as this one, but I’ll bask in the glow for a few more days, at least.

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