Starting to try and use my HRM as an aid to gaining fitness. Nice ride round inners yesterday morning saw a peak of 179bpm which seems OK considering i had a real pop at a couple of climbs.
round the pentlands last night and two things firstly i bonked pretty badly and my bpm reached the 230s twice. Can this be related to the bonk? I certainly was trying no harder, in fact less effort due to the “oo not good” factor.
My Polar used to hit 230 sometimes, I think it was the maximum it would record, I put it down to power lines etc. because my Max HR is around 189. Some lights, HID and LED can affect HRM’s and moving them just an inch or two further apart can make all the difference.
AH now two explanations that make sense and remove the exploding heart theory.
Power lines possible but i can’t think where there are any on the route, dare say there are just not looked.
BUT hrm attached to stem and Exposure is on bars bang up against the stem so very close. Interference it is then.