Dedication, muscle strength, and balance of mind and body. The very spirit and flow of energy within the body affect bending every much as the strength of the muscles did, the form and movements helping to channel it to the desired end. But when Luz mentioned Toph Jinora smiled again,

"Really? Milo would be excited to here that, he seemed to be really excited to meet her the first time. But she probably wouldn't know who any of us are."

Jinora did have to admit that Korra was in pretty great shape physically. She wondered if that was part of the reason why everyone kept falling in love with her. After all there had been Bolin, Mako, and then Asami. It was pretty complicated for a young girl to follow with everything else that was going on.

"So you don't have bending where you're from? But you have magic, how does it work?"

Now Jinora was curious. She'd learned so much about bending, but never really thought about or looked into anything related to magic, or what she'd seen Luz do earlier.