She stated that they haven't started MT yet, so I don't think it's a Leg Kick. Besides, if I remember right, the OP is currently in TKD so they are probably using a kick to her body to open.
To the OP: What type of technique are we talking about here? Let me know what you're dealing with, and I might be able to suggest something. Further, you can check this thread
here to see if it helps any.
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