Extremely high HR spike (sharp curves) on Garmin 705 data

72hundred

Hey,

Quick Q for those with 705's and maybe those without 'em.

Have you ever noticed a very very high heart rate on the data?

Looking over some data I see I hit a sharp curve at a decent, when I'm hardly doing any work.

HR data "anomaly" starts at 180, peaks at 213 (!!! that's arrhythmia territory) and back down to 180. Over the course of 2 min's.

The chances of it being a legitimate heart rate are low. Firstly, I wasn't working at the time and secondly I've no previous history of arrhythmias. So I really don't think its legit.

Anyways, this leads me on to the next thing. If its not legit. Are there things that trigger a HR data to get corrupted? High-Voltage Power lines etc? Ask as curious.

niceonetom

Poor skin contact.

Failing battery.

Chips Lovell

Yes, wireless signals can get corrupted. It rarely happens to me here, but there's a spot in Spain where my heart rate routinely spikes to 250. My max is 193.

DirkVoodoo

Ignore it, lots of things like overhead power lines or other sources of interference can mess up the signal with a wireless device.

Aside from that, a HR relies on good contact between skin and the contacts. A lot of synthetic fabrics (like canterbury tops) wick away moisture from your skin which is needed for a better signal.

ROK ON

There are two spots in Kerry where this used to happen to me for speed, altitude, gradient and HOUR.
I now have a Garmin 500 and it no longer happens - don't know why a change in device from 305 to 500 makes a difference to picking up a satellite signal.

DirkVoodoo

ROK ON wrote: »

There are two spots in Kerry where this used to happen to me for speed, altitude, gradient and HOUR.
I now have a Garmin 500 and it no longer happens - don't know why a change in device from 305 to 500 makes a difference to picking up a satellite signal.

Probably more to do with software refinements rather than a change in the hardware.

72hundred

Cool yea, that's what I though. I'll keep an eye out there next time to see any power lines etc.

@El tonto: 103 yea? Do you pass out if you stand up too quickly (jk)!

ROK ON

@7200. If you route your garmin data thru ridewithgps it should correct any mistakes.

mloc123

what strap have you? old plastic style one or the newer soft strap?

Chips Lovell

72hundred wrote: »

@El tonto: 103 yea? Do you pass out if you stand up too quickly (jk)!

LOL, that was meant to be 193.

72hundred

Cheers might try Ridewithgps to sort out the prob's.

Its the "old" type, although the unit was only bought in March though.

Good stuff tonto, 103 would be bit problematic with everyday use!

gmoorewest

Same thing happen me a couple of years ago, was sure I was having a heart attack on the bike, HR went to 250. Went to doc next day and spent two months waiting for it to happen again with specialist, hooked up to ECG on treadmill, ultra sounds etc. Also wore a mini ECG monitor which showed this happened both on and off bike. There are different types of tachycardia and it was harmless for me, just annoying as it feel like a bird caught in your chest. It's worth getting it check as it may not be strap/contact/signal problems. Tends to happen more when I'm raising or losing fitness level. Wasn't serious for me but you should check it out.

Blowfish

I haven't had the high spike, but I've had the opposite where it dropped lower than what the 705 can measure for a while when trying to work out my resting heart rate. I'd presume it was a poor contact issue, either that or I died for a few minutes.