DIR-Atlanta
Contributor
For both me and my husband, once we got the back kick working well, we agreed that the motion you use feels circular, like your feet are making little circles outward.
I've tried to figure out what motion I use for the back-kick, and it's definitely not that easy to analyze. I don't believe I use exactly the same technique to load the fins as what they are teaching in GUE-F. From what I have seen from students who have taken GUE-F, they seem to emphasize the full extension version of the kick (i.e. turn ankles in so fin tips touch, extend legs straight backward, and then flare the fins out and draw forward).
I think my lower legs rotate back on the load stroke, rather than being extended back. I believe my fins are somewhat angled during this movement, but without the fin tips actually touching together - similar to the tail of an F-117 fighter. At least that's how it feels anyway. I guess I need to get one of my DIR buds to shoot some video of me to be able to tell for sure.
And just as an additional note - most of these propulsion techniques can be done with an entire range of possible movements, utilizing everything from knees, calves, and ankles (i.e. "big" motion) down to just ankles for sculling (i.e. "small" motion). I commonly do a small motion back-kick (which I call a back "flick") that involves just the ankles, and of course there is not much leg extension at all on that. That motion is definitely circular with respect to the fin tips, as TSandM describes.