
Originally Posted by
Bonaparte
Yes: Extracellular vs intracellular hydration.
By altering electrolyte levels (as well as a few other tricks), you can cause a shift in fluid from cells to interstitial space (between the cells) or vice versa.
Creatine will cause water retention within muscle cells, as will glycogen (they are large molecules that attract water). Intrellular vs extracellular fluid balance is what BBers play with for contest showing. They do everything possible to encourage fluid within the muscle (intracellular), while minimizing extracellular water through the use of diuretics, androgens, low E2, and carefully timed and calculated water intake.
You can also have localized edema (fluid collection in the legs, abdomen, lungs, or what have you), but this is usually associated with CHF or renal failure.