Sarul was tested against other superior throwers, and while some could lift more weight, he was far ahead in tests of bar speed during the snatch and squats of 1 and 3 reps. His advantage in speed and the development of power was directly achieved by increasing bar speed, while the others fell behind from lifting too slowly. H.I.T. proponents use a lot of machines. This is truly a mistake. No stability can be developed.
Most machines work on the peak contraction theory.
Let's look at the pec machine. If you load a pec machine to the max, starting the movement requires a max effort, which is very difficult and dangerous. Yet at the finish, where the most weight can be lifted because of accommodating resistance, machines show their downfall. More importantly, let's consider the strength curve. Take the case of two 700-pound deadlifters.