>>Mizuzoku Koura, Zipangi national, born April 14, 2372;
>>five foot seven, 142 pounds - he could believe that; she was a sturdy-
>>looking gal, not one of those offputting muscles-on-muscles types, but
>>very nicely cut
>
>That actually seems incredibly light for someone of Korra's size,
>build, and athleticism. I'm 5'10 and weigh about the same, and I'm a
>pile of skin and bones and ridiculously out of shape. Korra seems like
>she ought to be up around 175 or so; there's not an ounce of fat on
>her and while she isn't heavily muscled, she is, as the man noted,
>cut.

You might be surprised; women tend to weigh less than their height alone would suggest. For example, Sarah D'Alelio is an MMA fighter who stands 5'7", and she only weighs 135 lbs.