As much as rowing seems like an exercise in the arm, most of the strength for each stroke really comes from the leg push. It's also important to note that it's not just how many strokes a minute you can do, but about the quality of each stroke and how much space you can create for each stroke.
7 Burpees Over Bar 7 Reverse Lunges (60/40 kg) 17 calorie Assault Bike 7 Dumbbell Snatches (22.5/15 kg) 7 Forward Lunges (60/40 kg) 17 Back Extensions 7 x 20 meter Yoke Walks (60/40 kg)