Zone diagrams running

When running, there’s one diagram at the bottom, assuming the colors indicate hr zones.

Top left there’s another performance window, showing HR and other indicators, also in different colors based on performance (.

The top left and the bottom colors often indicate different colors/zones. The bottom one seems to move into the next zone much earlier than the top left.

What does the colors bottom and top left represent?

I use polar h10 pulse band, Solar F85 threadmill, Stryd, running Swift on samsung Android pad and Samsung Galaxy watch 3, with Samsung health

Mucho monitoring :rofl: