Shallow water heartrate

[m2b]

How much can you really expect your heartrate to drop while diving? I'm not talking deep diving, only 4-5 feet underwater at the most all night long. Exhale, static dive, no reverse packing, and only down 25-30 seconds tops, no contractions.

I definitely need to get my hands on a WORKING heartrate monitor.

Thanks,
Ryan

 

[jome]

This is again of course personal for eveyone, but here's how it seems to work for me.

On an exhale static, the HR does not drop immediately. It starts dropping after I get the first contractions and starts dropping faster the stronger the contractions get. On a wet exhale static, the one time I measured it, the HR was around 30 in the end.

On an exhale dive in cold water to 10m, my HR dropped to 30 very quickly after I stopped moving and just hang there for a few seconds. I think this monitor didn't measure below that, so it might have been less. It was around the 80s when leaving the surface.

These are the only two times I've dived with a HR monitor.

My resting heart rate at the time was 60-65...

From what I've read, talked to others and experienced my self, the most effective HR drop comes when you start to feel uncomfortable ie contractions...

On an inhale static my HR remains elevated throughout the performance. It drops slightly in the uncomfortable phase, but not much, and shoots through the roof in the very end.

 

[Mlaen]

It's different thing with me...
On the start of my ex. static HR drops to around 49 and when it gets painful they are ~45. When I inhale they immidiatly drop to <40 and slowly start to increase.
Im having Polar A3 that should go to -30M but don't want to test that so I dont dive with it but when I enter in cold water HR drops from ~100 after putting my suit on to <60 in a few sec.

 

[m2b]

I was asking cause the first time I noticed mine dropped to what seemed like resting heartrate pretty quickly and stopped there but last night was a different story. It really dropped, like down toward 35-40 bpm with no contractions and no real urge to breath. When I came up there was no panicky breathing, just normal everyday breathing. I wasn't out of breath or anything like that. I was very strange FEELING my heartbeat so slowly. I've never noticed it that slow before. Since I wasn't at any kind of depth, 4-5 feet underwater, it seemed very unusual.

I did notice the fridykning site last night and the tests that he has did with oxygen level and heartrate, quite interesting/scary at the same time.

Thanks,
Ryan

 

[Decca]

I have done exhale diving in a pool about the depth you mentioned, and noticed a significant reduction in heart rate. As I recall, it was to less thn 30 bpm. My heart rate monitor was a finger on the pulse.

I exhaled and sunk to the botton of the pool and remained there for about a minute before moving on. The drop in heart rate happened quickly due to the dive reflex.

 

[m2b]

The problem is I thought that it took going to some reasonable amount of depth before the dive reflex kicked in. I thought even with exhale diving that you still had to get down 20-50 feet before you could even hope to kick it in. Being in only 4-5 feet deep water is why it seemed so strange/eerie. I would love to see one of the big boys answer this thread. It might expand my thoughts/beliefs on what it takes to kick in the reflex.

Ryan