Yeah that jumprope thing is pretty hot. I think the character's name is Polno, but i have no idea what anime she's from. Anyway the site it comes from is:
http://www.bakaweb.com/kuma/
There aren't very many pictures there but what is there is pretty damn good, especially 2 more of those animated pictures. One is King of Fighters' Mai Shiranui walking, and the other is of Dead or Alive's Kasumi running. They can be found under the 'gif gallery' section.