Could be a couple things. If you're able to get your weight really far back over your feet and keep it there with a considerable layback, you'll jump backward. More likely, though, is that you're sweeping your feet back as you pull under - that is, your body is pretty much staying in place, but you're flexing your knees without lifting the knees enough during the third pull, so your feet end up behind your center of mass. Only way to know for sure is to see video.
|