[penguinator]

I read on a webpage (Maybe apneamania?) about a particular type of training which intrigued me..

It involved standing up the top of a stairwell with multiple stories (like an apartment block fire-escape), doing your normal breathup, holding, then walking down a couple of stories. Upon reaching your target (still holding) you then 'ascend' back up to the 'surface'.

It is meant to be a 'dry' alternate to training for depth.

I am quite interested to see how many people here have actually tried this, and better yet - see how many people actually have it as a regular training tool.