05/20/2026
Alpha Flys welcome, Fast R3s tolerated š
I am an insanely data driven person, so when I saw all of the lab tests being published about the Fast R3 compared to the Alpha Fly 3, making the switch was a clear no brainer.
Except when the shoes arrived, they just didnāt feelā¦ right. I ran a 10x1k threshold workout in them and just felt āoffā the whole time. Surely, that couldnāt be right. Iād seen the metrics! So I ran another track workout with 6x1 mile repeats the following week. Same thing.
āOk it has to be the track. Let me try them on the roads where Iāll actually be racing.ā Nope. I then realized I had access to the actual FIT files from and boom, my feeling was right! The Alpha Fly was more efficient on every single metric for me.
So whatās the moral of the story? Trust your gut. Every runner is uniquely individual. While sure, the Fast R3 maybe are the clear winner for some runners, thatās not the case for all runners. Theyāre also just shoes. The real thing that matters is the work you put into the build.
And at the end of the day: the sub-2 marathons werenāt run in either of these shoes. Unfortunately, the super shoe is a bit too expensive for my budget to test š
š. The word may never knowā¦
