Why no WARM UP when diving?

[diver 85]

DDM--"That's thought to be related to the decreased blood flow at rest/during sleep - less blood flow means more opportunity for clots to form around plaques in the coronary arteries."----looks like a good reason to never go to sleep, -----again

 

[Bubbletrubble]

Ive read about the incidence of Heart attacks being significantly higher in the morning but as we get active and past the first 4 hours of the day - the risk throughout the day drops significantly.

That's thought to be related to the decreased blood flow at rest/during sleep - less blood flow means more opportunity for clots to form around plaques in the coronary arteries.

That's interesting. I didn't think that blood flow was the causative factor (although it would obviously occur in a latter stage of the pathogenesis). I thought that there was some evidence to suggest that platelet aggregation was increased in the early morning hours. Some scientists speculate that there's a link between platelet aggregation and circadian rhythms (although the evidence for such a link is still inconclusive).

 

[Duke Dive Medicine]

That's interesting. I didn't think that blood flow was the causative factor (although it would obviously occur in a latter stage of the pathogenesis). I thought that there was some evidence to suggest that platelet aggregation was increased in the early morning hours. Some scientists speculate that there's a link between platelet aggregation and circadian rhythms (although the evidence for such a link is still inconclusive).

Thanks. I'm honestly not familiar with that body of work but I looked at a few abstracts in PubMed just now and it made interesting reading. What I told the OP was what I'd learned back in nursing school. Let nobody say I'm not smarter now than I was 10 minutes ago.

 

[manni-yunk]

Thanks. I'm honestly not familiar with that body of work but I looked at a few abstracts in PubMed just now and it made interesting reading. What I told the OP was what I'd learned back in nursing school. Let nobody say I'm not smarter now than I was 10 minutes ago.

There are several different proposed mechanisms of action for the early morning MI incidence rate - all having been widely published and researched.

 

[Bubbletrubble]

There are several different proposed mechanisms of action for the early morning MI incidence rate - all having been widely published and researched.

Yeah. Lots of work/speculation out there on this. In addition to the platelet aggregation hypothesis, studies have investigated several other etiologic factors: early morning increase in arterial pressure, hormonal changes (circadian-related perhaps?), increase in coronary arterial tone, primary arrhythmias, etc. It's likely that a combination of some or all of these factors cause a high percentage of MIs to occur in the early morning.

 

[Mike_booger]

From what I can remember from my Dive Physiology training that exercise and staying in shape reduces your chances of getting bent. With that said I also remember you don’t want to do a workout prior to diving either. So if a warm-up is like stretching or something like that. I would not think it would hurt. However, I am not a Doc, I am just relying on what my training stated.

 

[Hemlon]

I get some degree of warmup by carting scuba gear around, and getting to the water . . . but, except in a few really unusual situations, I have NEVER had to do anything I considered significant exertion in the water. Going through a warmup and stretching regimen to float around and look at fish seems like major overkill.

What she said...

 

[johnfraser1]

i have irregular heartbeats called pvc's. they've been medically evaluated and are not pathological ie they are called functional and not a health risk.
the person who posed the question remarked that warming up would lessen irregular heartbeats. perhaps, but whether warming up does lessen them or not, a person who has irregular heartbeats should have them medically evaluated. irregular beats might be pathological, ie a symptom of a medical condition and might cause problems above or under the water. working with their health care provider, the affected person then may want to get the irregular heartbeats treated and/or avoid diving if need be

 

[dwitt2n]

......I'll be hitting 57 in a few days...I stay active as well - look forward to 45 to 60 minutes of starting out slow and build up to a nice steady jog on the treadmill....before my dives tho - I stretch...and as has been mentioned here - that's what works for me.....I suspect you've been doing what's best for you throughout your diving career....stay with whatever works in making your dives safe and enjoyable....

 

[brixn]

Not warming up and indeed not excersising for the sport and being aerobically unfit and over-weight is a common problem in the SCUBA diving community worldwide. -At their peril (legally speaking) the recreational diving industry has chosen to close its eyes to need for divers to be fit. Every recent diving related health & fitness publication promotes fitness and proper diet. Forgotten or ignored by PADI, NAUI, SSI, SDI/TDI, etc. is the fact that Decompresion tables were designed FOR young fit men in military service. The evolution of SCUBA diving since 1959 has arrived at a point demonstrating that a significant number of SCUBA divers are obese, unfit and DANGEROUS to dive with. Fearing loss of 'customers' the dive shops ('diver training facilities' of the above-mentioned organisations) are ignoring their Duty of Care by accepting unfit individuals as trainees. It is a miracle that some smart 'ambulance chasing' lawyer has not seen the opportunity ! - A word of advice to Diving Instructors and Dive Masters: You put unfit divers into the water, - and if a fitness related accident happens; - you are likely to be called to account by the local authorities or the relatives of the victim. -