Joined: Aug 2009
Posts: 6,756
Likes: 5,372
From: Minneapolis
Bikes: 2022 Salsa Beargrease Carbon Deore 11, 2020 Salsa Warbird GRX 600, 2020 Canyon Ultimate CF SLX disc 9.0 Di2, 2020 Catrike Eola, 2016 Masi cxgr, 2011, Felt F3 Ltd, 2010 Trek 2.1, 2009 KHS Flite 220
I had all kinds of problems with my Garmin strap, including the ones that you describe - at times I thought that I must have tachycardia, but it was the strap. I figured that the strap was getting old, so I replaced it with another Garmin - mistake. Problems persisted. I bought a Wahoo Tickr. No more weird readings. And (helpfully) it does both ANT and bluetooth.