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11

tl; dr - Masks are (mostly) gimmicks. They advertise as being able to raise VO2 max, by simulating high altitude training. This would in turn, raise EPO in the body, which then in turn stimulates red blood cell production, increasing oxygen transport. In reality, while they may increase the muscle tone of the breathing muscles (intercostals, etc), they do ...


4

It sounds like there are several questions here, I will try to the best of my ability to answer them. "However, today my Garmin has especially bad day. After it took 15 minutes to get GPS signal, it blocked at about 170 bpm for the whole rest of the run. I could have much at the moment of the GPS lock, because it was a slope, but later, it was rather a ...


2

Cycling is different for your knees than running. Both runners and cyclists complain of knee pain, though usually for different reasons. Cycling is doing the exact same thing bajillions of time in a row, in a manner that we're good at, but not evolved for. Especially if you use clipless pedals, there can be issues. Running causes more stress on the knees. ...


2

I think that you're running into one of the limitations of an overly simplistic model like "80/20". Note that I'm not saying the idea behind it is bad, but the way it's being conveyed loses much of the nuance. To speak to what I believe to be the spirit of the model, don't stress about the distance or time per se. Rather make 20% of your runs be ...


1

In my experience (and I'm about the same level of runner as you, I'd guess, from what you've put above), speed training can be done in a shorter amount of time without much problem. What you can't do is distance train. 40 minutes is fine to train for a race you can finish in 40 minutes, or maybe enough to be able to do a 10k at the paces you show above - my ...


1

There's a lot of confounding variables in your data. The first one I noticed is relevant to world leaders. Survivorship bias You don't typically get to run a country until you're in your 40s at least. The US seems set on mid to late 70s at the moment... Runners typically peak before 30 (marathoners just before 30). So a runner has to make it 70 more ...


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