Meaning of two MPA numbers on GarminIQ screen

[ridgerider2]

Garmin IQ XERT Workout Player - MPA slider

Upper value is current MPA and the lower value is the Target (final) MPA for the interval. When the timer is purple, the player will attempt to get your MPA to the target value by the end of the interval.

Are you running the Connect IQ app because you want your indoor workouts to be saved on Garmin Connect instead of using EBC?