Do they? and how effective are they?
Do they? and how effective are they?
no
Altitude tents work, oxy debt marks do not.
anything to show me they do work? and how?
no
oxygen debt masks work by creating a void space around your mouth. it creates a pocket where exhaled gas sits. so when you breathe in, you get some of that instead of 100% air.
and no, they aren't a useful training tool. just run faster
there is no equivalent to running at altitude by wearing a mask.
altitude tents are another story
RIP: D3 All-American Frank Csorba - who ran 13:56 in March - dead
RENATO can you talk about the preparation of Emile Cairess 2:06
Running for Bowerman Track Club used to be cool now its embarrassing
Rest in Peace Adrian Lehmann - 2:11 Swiss marathoner. Dies of heart attack.
Hats off to my dad. He just ran a 1:42 Half Marathon and turns 75 in 2 months!
Great interview with Steve Cram - says Jakob has no chance of WRs this year