2km in 14: 29? any good?
this is the first time i've run long distance in a long time, and i'm not particularly sporty. i didn't run all of it, but i ran about 3/4 of it.
i'm 13 and a half years old and a girl if it makes a difference

fluid balance is an aspect of the homeostasis of organisms in which the amount of water in the organism needs to be controlled, via osmoregulation and behavior, such that the concentrations of electrolytes (salts in solution) in the various body fluids are kept within healthy ranges. the core principle of fluid balance is that the amount of water lost from the body must equal the amount of water taken in.