I have been "Driving from the hips" on my daily commutes, 6 mi each way. Trying to do it at all times. My average speed is up almost 2mph, crusing speed 2-4 mph. So no question it is effective, but also get very winded. It is hard to do it at a more moderate effort. My glutes are starting to feel it, but my back feels fine. I think I can train to both sustain in longer, and do it more moderately.

I think this technique has only occurred to me now, after some 200,000 miles because of some recent changes. The biggest is changing to a crank length proportional to my leg length: 37" inseam, 200mm cranks, has simply made everything better. With my old standard, 180mm, it really limited the effort to my quads. You might say, I wasn't making use of my best ASSets.