Which leads to the question where is the data re. you are not a world champ and you get significantly better training results with power rather then HR?
I didn't say that. I said that if choosing shitty power data vs. Good power data and on a budget why even bother with power? Plenty of people use hr and smoke us.
Buy a HRM for hundreds of quid less.
So, it lags a bit at the start of efforts. At least it's accurate in its measurement.
Lots of super fast people have raced and won with no electronics. That's the cheapest option.