Row for 1 minute applying as much power and force as you can, then take 1 minute of very light strokes for rest. That’s one rep. Complete 5 reps and then take a short break, no more than a few minutes, before moving on to the next set. Similarly, the goal is to hold the lowest split possible in the hard pieces. The prescribed stroke rates are 18, 20, 22, 24, and 26 for the first set; 20, 22, 24, 26, and 28 for the second; and 22, 24, 26, 28, and 30 for the third.
In 1981, Peter and Richard Dreissigacker, and Jonathan Williams, filed for U.S. patent protection, as joint inventors of a "Stationary Rowing Unit". The patent was granted in 1983 (US4396188A). The first commercial embodiment of the Concept2 "rowing ergometer" (as it came to be known) was the Model A, a fixed-frame sliding-seat design using a bicycle wheel with fins attached for air resistance. The Model B, introduced in 1986, introduced a solid cast flywheel (now enclosed by a cage) and the first digital performance monitor, which proved revolutionary. This machine's capability of accurate calibration combined with easy transportability spawned the sport of competitive indoor rowing, and revolutionised training and selection procedures for watercraft rowing. Later models were the C (1993) and D (2003).