Abnormally High Heart Rate on the Downhill?

[thabias]

iBike Rides.rar

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Hey everyone,

Two Questions:
1) I've done about 10 rides with my power dash and I'm noticing that on the downhills, my heart rate increases to something in the 220+ range for the duration of the downhill. Prior to the downhill, it's somewhere in the mid 100's, especially on this last ride yesterday. The mount seems to be solid, but I did notice a tiny bit of play in the top section where the booth mounts to the stem mount with 2 phillips screws. I'm thinking of putting locktite on them as them seem to constantly loosen up.

2) Also, when recording a ride and coming to a stop of some length of time, the dash seems to continually record throughout, as expected.
Are the numbers being averaged out over time or only when you're moving?
Is there a separate number in the ibike software that shows seat time?

Attached are the two parts to yesterday's ride. Any help would be greatly appreciated.

Thanks!
-Scott-

[jesawdy]

1) I've done about 10 rides with my power dash and I'm noticing that on the downhills, my heart rate increases to something in the 220+ range for the duration of the downhill. Prior to the downhill, it's somewhere in the mid 100's, especially on this last ride yesterday. The mount seems to be solid, but I did notice a tiny bit of play in the top section where the booth mounts to the stem mount with 2 phillips screws. I'm thinking of putting locktite on them as them seem to constantly loosen up.

Scott-

I see this fairly often with two different Garmin heart rate straps. The older Garmin strap I had looks very similar to the iBike HR strap. I now have the "new" premium Garmin HR strap that came with the Garmin Edge 800, and I still see this sometimes.

These HR spikes seem related to jersey materials, wind speed and potential lack of good skin contact with the HR strap. In my experience, it also seems to be more prevalent in cooler and drier weather. Lots of suggestion over at DC rainmaker's site, but I think he still sees this issue sometimes even with the use of cardio gel - Link 1 and Link2.

-Jeff

[jesawdy]

Here's one more link re: HR spikes - Link 3