Is it possible to obtain an electrocardiogram from a pedal ride with cardiac activity recording with a heart rate monitor?
It’s possible indoor.
You need a polar H10, a PC or laptop and FitnessECG application.
On iPhone this app can do it
On Android this app can do it
Yes, those apps will record ECG, but it will be hard to sync the ECG from them to your other metrics recorded.
What other metrics did they request?