Fluid balance is controlled to the minute and your body will find equilibrium so quick that you won’t even get a chance to visibly see any changes. Well, except for the fact that you are now watery, and to add insult to injury you are also flat! Because you cut water there is simply less water to go around everywhere, including your muscles which are 70% water. Again, there is a fluid balance that you cannot control and it’s more complicated and delicate than just potassium and sodium. Add that to the massive amount of carbs that bodybuilders are throwing in the day of a show and you have a nasty mess of a spillover on your hands. After seeing stage pictures, many competitors in the back of their minds recall a random day three weeks ago at the gym (because they did nothing extreme then) where they looked better than the day of the show. Not only are these kinds of manipulations detrimental to your appearance, they are just not healthy. Sadly it is common for competitors to pass out from the lack of water and become unable to compete when these manipulations are implemented. A few years ago, a now retired IFBB pro had to be hospitalized for this very reason; his potassium levels were so high that he went into heart arrhythmia. Yes, potassium at extreme levels can be very dangerous or even lethal. The final week should be more about fine tuning your appearance, working out the details from weeks previous and you should feel your best. On the days of all my shows, I feel great. I am hydrated and moderately carbed–up, with potassium and sodium at the same levels they have been during my whole prep.