Author: TedHarty

Learn more about the mammalian dive reflex

Here is a video discussing the mammalian dive reflex  I made to go along with article I wrote for In the article I discussed why spearfisherman should consider holding their breath on the couch if they have been out of the water for a while to help get their mammalian dive reflex tuned up.  This video elaborates on what the dive reflex is and how you can use it to help you on your next spearfishing trip.      Check out all of my Tuesday Tip videos below.   Tuesday Tip #1 How to test if you...

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Blackout while spearfishing – I know my limits, I’m in tune with my body

The fallacy behind I don’t push myself and I’m in tune with my body. As the sport of freediving and spearfishing continue to grow unfortunately the fatalities from blackout will continue to grow as long as divers continue to ignore basic safety protocols. Most divers know you are supposed to dive with a buddy and dive one up, one down. Yet many of those same people don’t do either of those things. In my opinion, what follows is one of the reasons this decision is made. Most people reading this magazine have probably tried seeing how long you can...

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Past student Jose Vegas dives at Deja Blue and gives his review of Immersion

Jose Vega is a neurologist and past student of mine. He took his course to get over being uncomfortable in the open ocean. He has clearly overcome and now travels the world freediving in exotic locations and has worked with instructors all over the world.   He recently published an article in the journal of applied physiology on the history of the dive reflex.   You can read it @   You can see a video of his diving from the competition below.   Here is his review of the course.   Up until a few years ago I...

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About Immersion Freediving

Immersion Freediving was founded in 2010 with the goal of offering the most comprehensive freediving courses on the market, while teaching students to dive deeper, stay longer, and most importantly become safer. My approach is to take the skills that I have developed as a 279ft competitive free diver and modify those techniques so they are applicable to a recreational freediver or spearfisherman. I will fundamentally and permanently alter your approaching to freediving by showing you the Immersion way.

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