The fast talk episode on low gear work is an interesting listen overall. It touches upon the gap between coaching practice of prescribing high torque work and literature which tends to suggest limited benefits from doing it. They also discuss practical aspects of application: Put It in the Big Gear—We Explore Low-Cadence, High-Torque Training with Neal Henderson - Fast Talk Laboratories
I picked up some workouts from Henderson after listening to the episode, particularly the one where an initial almost all out standing start on a high gear is followed by 2-5min at close to threshold at low RPMs. Incidentally, I did this workout today with six efforts. The standing start on 53x12 produced peak torques around 150nm and the sustained part hovered around 50-55nm. This was on Quarq dzero.
The highest peak torque I have attained during an all out high gear standing start is 270nm. This was on my Powertap G3 during a standard standing start effort. Let’s just say that the dzero reading is more believable to me, but what do I know.
For what it’s worth, I think there is a definite benefit to low gear work. At the very minimum it lowers the RPE of hard efforts, especially at the end of longer rides or races, but IMHO it also helps in applying power during the pedalstroke. This may be just me, but I often couple low gear work with high cadence intervals. Put it this way, it pays to overload the system by over and undergeared efforts.