You are reading a single comment by @QueSeraSara and its replies.
Click here to read the full conversation.
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
QueSeraSara
The jump in the HR at the start of the hill is a classic symptom of your HRM strap picking up an increase in cadence (which is natural as you start climbing) as an increase in HR. I had exactly the same with one particular brand of HR strap.
See if you can borrow a different strap, or use a wrist/bicep style strap like a Polar OH1+ to see if that changes things. Inaccurate/misleading HR data is worse than no HR data at all.
Glad it's not medical.