Mantis M1 HeartRate data

[Hitham]

Hello..
I'm experienced freediver just got hooked into scuba.. decided to purchase the M1 computer to be used for both scuba and freediving.. i understand the heart rate data will improve the algorithm.. but what i'm interested to know if i can display my current heart rate at any giving time during the dive mostly in freedive mode to manually monitor stress levels..

another thing does the logbook display heart rate data too ? on watch or PC
Cheers..

 

[tridacna]

Please explain how heart rate improves the algorithm.

 

[Hitham]

Please explain how heart rate improves the algorithm.

Thats what they said in their site.. by getting skin temperature and heart rate...
i figure that you dont own one so can't help me with heart rate on screen display ?

 

[Hatul]

Don't know about the Mantis but I have the Galileo Sol, which also measure the HR and display it continuously on the computer. And yes the algorithm takes into account the stress level to make the algorithm more conservative and improve the model. When in a stressful situation I can see my HR increase in real time and in reviewing after the dive.

 

[tridacna]

Don't know about the Mantis but I have the Galileo Sol, which also measure the HR and display it continuously on the computer. And yes the algorithm takes into account the stress level to make the algorithm more conservative and improve the model. When in a stressful situation I can see my HR increase in real time and in reviewing after the dive.

Are you saying that SP have modified the deco algorithms to accomodate HR changes? Interesting. I'd love to get manufacturer confirmation of this.

I really hope that SP are not including this rubbish in the new Seabear computers. Based on the lousy sales of the Mantis, I think that it would be a huge mistake.

 

[Hatul]

It's documented in the Galileo manual:
At the base of any
calculation there is the transport of nitrogen
from the lungs to the blood and from there to
the tissues during ongassing, and the same
again in reverse during offgassing. As such
it is obvious that the single most important
parameter in a decompression calculation is
the rate at which blood travels through the
body. During heavy exercise, the total blood
fl ow from the heart can be up to 4 times
higher than while at rest. This increase in
blood fl ow is rather unevenly distributed, with
some tissues such as the Central Nervous
System and the brain being unaffected,
while others like the muscles receiving up to
ten times more blood than at rest.
UWATEC introduced workload-induced
decompression algorithm compensation in
1995 with the Aladin Air X dive computer.
The workload estimation was based on
changes in the breathing pattern as detected
by the hoseless high pressure transmitter,
and the decompression calculation in four
of the 8 compartments in the ZH-L8 ADT
model was changed accordingly.
Galileo is the first dive computer to have an
integrated heart rate monitor, based on world
leading heart rate monitor technology by Polar
(for Galileo to receive heart rate information,
you must wear the Polar T31 coded transmitter
as described in section 1.13). The heart rate
is directly linked to the pumping action of the
heart, and as such it is a more direct indicator
of workload than respiration.

 

[tridacna]

Please refer to a peer reviewed publication. Self-published user manuals by the manufacturer don't count.