HR zones or %MHR for other riders?

I was riding today and obviously not privy to the weight of my fellow riders, I started to wonder how hard are these other guys ‘really’ working? The descents where some riders fly away made me quite interested in knowing their efforts.

A nice touch could be a small heart shape next to on the rear of a rider with their %MHR value inside it? This would obviously have to entered in the riders profile when setting up.

heart rate does not matter. watts do. what you are really seeing, though, is the fact that some equipment being used allowed riders to gain virtual speed on the downhill much faster than others. Things are not completely dialed in on zwift island.