How it works
The R-21's unique water tank has been designed to reproduce the precise physical dynamics of a moving boat; the surest way to replicate the physiological benefits and aesthetic pleasure of rowing.
Like rowing, the R-21 does not apply resistance to you, you apply work to it; you are the engine! By the “rule of cubes”, the amount of work you apply dictates the speed at which you row. Because water is 800 times more dense than the air, the more work you do, the more resistance/drag you can overcome and the faster you move.