Editing Openai/681633cc-5fec-8001-85df-1eb55949397a


{{DISPLAYTITLE:Cadence Lock Analysis}}

''This conversation was exported from ChatGPT''<ref>{{cite web|title=Cadence Lock Analysis|url=https://chatgpt.com/share/681633cc-5fec-8001-85df-1eb55949397a|publisher=ChatGPT|access-date=2025-11-17}}</ref>

== gpt-4o ==
=== User: Please check this run to determine if my watch had a cadence lock issue. ===
Please check this run to determine if my watch had a cadence lock issue. Please generate a chart with cadence and HR on the y-axis (using the same scale), run duration on the x-axis (using mm:ss format), and elevation in the background on another y-axis (using a tight elevation range and a very light color).

Left Y-Axis Range: 60–200 (bpm/spm)
Right Y-Axis: Elevation should be calculated in feet
X-Axis: All times should be in mm:ss format

Remember: Coros reports cadence as steps per minute (SPM) per leg, so you'll need to multiply by 2 to have the correct cadence.

Chart Style:
* Dark background for a sleek, modern look.
* Bright, neon-style colors (teal, magenta, lime green, cyan, orange, purple) for data lines and bars.
* Rounded fonts and smooth curves where applicable.
* Glowing or gradient-style visual effects.
* Minimalistic, clean layout with clear separation between panels.

=== Assistant: Here's your customized chart showing heart rate, cadence with cadence correctly doubled, and elevation over time: ===
Here's your customized chart showing heart rate, cadence (with cadence correctly doubled), and elevation over time:
* HR and cadence are plotted on the left y-axis (60–200 bpm/spm range).
* Elevation (in feet) appears as a subtle shaded background using a tight vertical range.
* The x-axis uses mm:ss formatting for elapsed time.
* Styling matches your requested dark, neon-accented, modern aesthetic.

Would you like me to calculate the correlation between cadence and heart rate next to assess possible cadence lock?

=== User: Looks like a couple periods of cadence lock to me. ===
Looks like a couple periods of cadence lock to me. On an easy run like this, my heart rate never reaches 190. And, the drop-offs from those numbers are atypical for a sustained run. Your analysis?

=== Assistant: You're exactly right to be suspicious — those sharp spikes in heart rate that match cadence especially nearing 190 bpm … ===
You're exactly right to be suspicious — those sharp spikes in heart rate that match cadence (especially nearing 190 bpm) during an easy run are classic signs of cadence lock.

===== Here's what the data and visual show: =====
* Cadence is steady: During the affected zones, cadence remains consistent, likely in the 180–190 spm range.
'' Heart rate ''matches* cadence: HR suddenly rises to mirror cadence almost exactly, which is biologically implausible for an easy effort — especially if you're normally in the 140s–150s at this pace.
* Abrupt changes: The HR line shows sudden increases and drops that aren't mirrored by any cadence or elevation changes — which would normally explain HR shifts if they were real.

===== Common causes: =====
* Optical wrist sensors (used by most COROS watches) can confuse rhythmic wrist movement at running cadence with pulse signals — particularly during steady-state efforts where there’s little variation in pace or arm motion.
* Cadence lock is more likely during: - Cool-weather runs (vasoconstriction) - Runs with minimal arm swing variation - Loose watch fit or high sweat accumulation

===== Your conclusion is supported by: =====
* Timing of the spikes
* Improbable HR values
* Clean cadence data that remains unaffected

Would you like a cleaned chart with the likely cadence-lock portions flagged or removed for more accurate heart rate analysis?

== References ==
<references />


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