Thursday, August 27, 2015

Changes to GPS Accuracy testing



I've made two changes to the way I calculate GPS Accuracy scores. The first change is that the overall accuracy is now a combination of Precision and Trueness, which changes the relative order slightly, but the underlying detailed results remain the same.

The second change is that I'm now calculating Precision rather differently. Instead of treating every lap equally, I now group them by the segment of the course, calculate Precision for each segment, and then combine the results. This is to offset the problem that some watches have a slightly higher percentage of their lap data for different areas, mostly due to me failing to hit the lap button occasionally. This does change the underlying results, with all scores increasing slightly due to the underlying math. This also changes the order, which is why I made the change. 

For the updated results, see GPS Accuracy and for details on my methodology see GPS Testing Methodology

Tuesday, August 25, 2015

Altra One 2.5 Review



I've updated my review of the Altra One for the 2.5 version, including comparisons with the previous version, Hoka Clifton 2, Asics Hyper Speed, NB RC5000, and Asics GT 2000. Altra One 2.5 Review

Wednesday, August 12, 2015

Tempo Runs: are they good or bad?



Tempo Runs: are they good or bad? Well, coaches and science say radically different things.   (This is part of my review of BSX and Moxy, with a lot more to come)

Tuesday, August 11, 2015

Hoka Odyssey Review



The Hoka Odyssey is nearly identical to the justifiably best-selling Hoka Clifton. The Odyssey was created by Hoka for sale in larger stores, which protects the specialty running stores. So just how close is the Odyssey to the Clifton and Clifton 2? Here's my analysis and comparison - Hoka Odyssey Review

Friday, July 24, 2015

Altra Instinct 3 Review



I really liked the Altra Instinct 2, but I don't find their update to be as compelling. The shoe is now too firm for its weight, though it's still a top contender for ultras where you don't want to cut the toe box open. I compare the Instinct 3 with the Instinct 2, Asics Gel Hyper Speed, Hoka Clifton, Altra One, Saucony Kinvara, and the Asics GT 2000. Altra Instinct 3 Review