You can do this protocol using dumbbells, a barbell, or on a seated row machine. The isometric is held at the full contraction because it forces you to focus at the top of the row – the part of the exercise where most people cheat.
Also, if you're using free weights you can vary your torso lean from a 45-degree angle to parallel to the floor, thereby hitting your muscles a bit differently.
This Tool Box series has become one of my most popular article sets to date, so why break with what's working? Here's the latest installment of this series designed to help experienced lifters fill in the blanks and learn the finer points of strength development.