To draw the way Michael Hampton does, it is important to have a strong sense of form, so I suggest, alongside with the book, parctice drawing the most primitive shapes (box, cylinder, sphere) like how proko shows on his video regarding structure, and then, move on to something less sketchy and more deliberate like drawbox, that course gives you the tools to start doforming those primitive shapes as you wish. But in the meantime, focus just in gesture, because is better to study form and gesture separately than trying to understand both at the same time.

I like them. Although I do believe the drawings are more structure/volume related than gestural. I'm pretty new to drawing, so I know it's really hard to capture all the volumes in a minute (at least for me it is), I would recommend following the Proko gesture video and then finding the gesture examples in Michael Hampton's book. I believe in the beginning of the book he has a few rough sketches where the anatomy isn't really defined too much. I think that would be a good example of gesture sketches