Short - 10,000m with cadence changes every 2000m
Ride for a total of 10000 meters at a sustainable intensity, varying your stroke rate as follows: row 2000 meters @ 70 rpm, 2000 meters @ 75 rpm, 2000 meters @ 80 rpm, 2000 meters @ 75 rpm, and 2000 meters @ 70 rpm.
Check this Concept2 workout on the ErgZone app: