Fancy a Brew? Season 3 Episode 10 - Talking to Angus Hosking about Free Diving in the Lake District

[@pinnacledivingco]

The “mammalian dive reflex” is an instinctual reflex that causes the respiratory system to slow down, and tells you to hold your breath, when you dip your face underwater. On scuba, it causes you to take deeper, slower breaths. It also slows the circulatory rate.

[@AndytheNorthernDiver]

Nice one thanks mate

[@pinnacledivingco]

The struggle of trying to get into and out of an open-cell neoprene suit without destroying is a special hell. 😂 I have a really nice 5mm Yamato open-cell neoprene suit, and while it is super warm to wear, far warmer than any other 5mm closed cell suits I have, it’s so difficult to get into and out of, I never wear it. I’ve only worn it a few times because of the difficulty, and I’m also always so nervous I’m going to possibly rip it open just trying to take it off. 😂😭🤷🏼‍♂️

[@AndytheNorthernDiver]

Yeah I understand that pain

[@pinnacledivingco]

SWB is the exact reason I won’t ever get into free diving. I’ve read it’s not good to hyperventilate prior to the dive either, as it’s what leads to SWB. As you dive deeper, same with scuba diving, the increased ATA also increases the Pp of the gas in the lungs. Your body metabolizes only a small amount (roughly 6%) of the O2 per respiratory cycle, and since the Pp is higher while you’re deeper, it doesn’t become hypoxic until you come back up. In the 0 to 10m range, that sudden drop in pressure as the ATA is halved, and by that point you’ve already metabolized enough O2 to make it hypoxic, is exactly what causes SWB. The suppression of the CO2 reflex that tells you that you need to breath (by hyperventilating prior to the dive) leads you to falsely believe you can go further and dive deeper.

[@AndytheNorthernDiver]

That’s super interesting and I’d not thought about it yet, I’ll have to in 3 weeks

[@_GB84]

Why don't your podcasts seem to work on any other platform? Had to come here to see if they were working here

[@AndytheNorthernDiver]

All done now mate cost £100 a year to keep them going and I’m not really earning off them so they get deleted once you stop paying the subscription, sorry mate

[@_GB84]

@@AndytheNorthernDiver yeah fair enough mate 👍At least all your stuff is saved here for now. Nice one 👌