This is great. It falls into the category of dynamic apnea, (holding your breath while moving). Most freediving falls into the same category (I think one event, dropping on a weighted sled, might not).
Static apnea would be just holding your breath.
It’s the pool setting of this that will resonate for most of us. The same guy is one the two joint holders of the “with fins” category, which is 265 metres.
Almost nine 25 metre pool lengths.