High Altitude Training Mask?!

[Dynamo Dan]

Saw a bloke running with one of these today: http://www.trainingmask.com/products...-MASK-2.0.html

Is he a fool or is this the new trend for triathletes?

[The devil's own]

I think this current craze was adopted by MMA fighters a few years ago with this...........



Now it seems to be trickling down to something less full on.

[Mike T]

Any evidence it works? I am not thinking of getting one but the physiological response - if any - would be interesting.

[Daletownrunner]

Surely it only makes it harder to breathe without the physiological benefits associated with training at high altitude, could you get the same effect with a nose clip and a couple of Buffs??