Elevation Training Mask

Doesn't work. At least not how they advertise. At altitude, there is actually a lower oxygen concentration in the air. The masks just restrict how much air you take in at a time. It would make the respiratory muscles physically stronger but that isn't the same thing as how your body adapts to altitude.

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When training i did a lot of sprint workouts high heat/humidity, and have never had a problem with the altitude

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Training in the heat/ humidity, I feel, was the difference maker in last week's race. I felt great after the race, and very conditioned...but there were several times where I felt dizzy enough to stop for a break.

There's got to be some sort of chart or table that would show training in heat/ humidity to high altitude equivalence. Running during the summer in Louisiana is miserable.

I'll incorporate more sprints for this next race in September.

I wouldn't say it is a scam as much as falsely advertised. In no way does it mimick high elevation. There is no way for it to. However, one positive I got from it was breath work. It makes you slow your breathing down and focus on those breaths as to not get winded fast. I ran for about 2 months with one and noticed a gained endurance in races. I didn't get winded so easily. It makes you take long and efficient breaths while still performing at a high level.