"Low: High"  
8 x 2 mins / 1 minute rest between rounds
Spend the first minute at a lower rate and then step up to a higher rate for the second minute

1: r20-->r24
1: r22-->r26
1: r24-->r28
1: r26-->r30
1: r22-->r26
1: r24-->r28
1: r26-->r30
1: r28-->r32

Followed along with DH rowing vid from Rowvember 2021. Use the legs, PRESS them to extension, don't just FLOP them to extension. A heavy breather out in the garage on a beautiful October afternoon.