Jumproping is one of my favorite exercises. However, jumproping (just like running) is not a good thing to do on concrete, or other very solid surfaces.
I just came back from snowboarding about 2 hours ago and my feet are aching! While I was showering after the trip, I noticed certain parts of my leg were very sore, and everywhere else was fine. My ankles were, for some reason, aching when I turned them in circles. But if you think about the configuration of bindings, your ankle does not move much, if at all. Carving toe side requires a lot of strength in the calf muscles, due to the motions and pushing needed. So somehow, the muscles needed to carve toe side and the ligaments and tendons near the ankle are used hand-in-hand.
Tek9, yes, I am studying Olympic style. WTF regulation to be exact.
Eat. Sleep. TKD.