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User profile: J Campbell
About 600 results

Spear buddy in DC/Bethesda MD area

The Spearo Board

#2 - J Campbell
Sent you a private message. ...
Sent you a private message. ...
Sent you a private message. ...

Toronto - Monday Pool general freedive Swims

General Freediving

#6 - J Campbell
Yep. Tried that with two scuba clubs. The answer is no, because of liability. ...
Yep. Tried that with two scuba clubs. The answer is no, because of liability. ...
Yep. Tried that with two scuba clubs. The answer is no, because of liability. ...

Toronto - Monday Pool general freedive Swims

General Freediving

#4 - J Campbell
Thanks! I live in Annapolis, MD. If you have any ideas on how to make this real, I'd love to hear it. ...
Thanks! I live in Annapolis, MD. If you have any ideas on how to make this real, I'd love to hear it. ...
Thanks! I live in Annapolis, MD. If you have any ideas on how to make this real, I'd love to hear it. ...

Toronto - Monday Pool general freedive Swims

General Freediving

#2 - J Campbell
I'm so jealous that you get to do this! The pools in my area don't allow breath holding or any underwater swimming. How ...
I'm so jealous that you get to do this! The pools in my area don't allow breath holding or any underwater swimming. How were you able to arrange this without push-back from the ...
I'm so jealous that you get to do this! The pools in my area don't allow breath holding or any underwater swimming. How were you able to arrange this without push-back from the "safety-nannys"? ...
#20 - J Campbell
I think divers are looking to use a weighted vest for buoyancy control, not for strength/endurance training. ...
I think divers are looking to use a weighted vest for buoyancy control, not for strength/endurance training. ...
I think divers are looking to use a weighted vest for buoyancy control, not for strength/endurance training. ...

Not a diver, just a breathholder.

Introductions and Greets

#2 - J Campbell
It's more fun underwater! ...
It's more fun underwater! ...
It's more fun underwater! ...

Cerebral/neuronal damages from hypoxia?

Freediving Science

#2 - J Campbell
It probably depends on how long you hold your breath. A competitor in static apnea is literally trying to get to the ...
It probably depends on how long you hold your breath. A competitor in static apnea is literally trying to get to the edge of blackout, which means depriving the brain of oxygen ...
It probably depends on how long you hold your breath. A competitor in static apnea is literally trying to get to the edge of blackout, which means depriving the brain of oxygen. But most recreational divers don’t stay down that long. ...
#7 - J Campbell
I've had an F10 for 5 years and it works great. I change the battery once per year. My only small gripe is that I can't ...
I've had an F10 for 5 years and it works great. I change the battery once per year. My only small gripe is that I can't hear the beeper tone. But that is not really a must-have ...
I've had an F10 for 5 years and it works great. I change the battery once per year. My only small gripe is that I can't hear the beeper tone. But that is not really a must-have feature for me. But I have also read that other watches have ...
#2 - J Campbell
Does the pool even allow breath holding and underwater swimming? Practice finning technique to improve your efficiency ...
Does the pool even allow breath holding and underwater swimming? Practice finning technique to improve your efficiency - see how few kicks you can do to reach the other end. Take a ...
Does the pool even allow breath holding and underwater swimming? Practice finning technique to improve your efficiency - see how few kicks you can do to reach the other end. Take a camera so you can see your finning mistakes. With a buddy ...
#9 - J Campbell
So, Bill, what makes you stop your breath hold? I'm guessing you get an urge to breathe that builds up stronger and ...
So, Bill, what makes you stop your breath hold? I'm guessing you get an urge to breathe that builds up stronger and stronger, correct? I only get mild contractions toward the end ...
So, Bill, what makes you stop your breath hold? I'm guessing you get an urge to breathe that builds up stronger and stronger, correct? I only get mild contractions toward the end of a very long breath hold, but they don't bother me as ...
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