first off, i recomend a complete series of blood tests. many different things can affect the water balance of the body so i am not going to speculate as to cause with so little info. i agree with p22 about the carbs, they should be kept low, w3hat i tell my athletes is that they should not bother counting carbs, instead, they can eat as much fruit as they want as long as their vegtable intake is about twice their protein intake (by this i mean if you eat 100g of meat, then eat 200g of veggies with that meal along with fish oil and olive oil or nuts). should not go more than 3 hours without eating animal protein and the new Low-Carb Grow! is perfect for before bed, the shift in metabolism from storage in adipose to storage in muscle is quite amazing, in short eat before bed for fat loss.
training should consist of lower reps and more sets and cardio should be sprints, if fat is stored centrally then run for the sprints 50-400m distances, if it is stored more evenly or ‘peripherally’ then sprints of 30s on a bike are better.
also for during and post workout nutrition unless otherwise counter indicated, use Surge. i went to a workshop with john berardi in toronto and in the lecture he showed us quite a few graphs that show the difference between different types of during and post workout nutrition, normal whey doesn’t cut it, hydrolyzed is required. this was advice for fat burning, also creatine and green tea are recomended by JB.
another thing is if her metabolism was really shut down by dieting, then she can actually be training hard and consuming too few calories, so protein is 2g/lb, carbs - don’t matter if from fruit or Surge during and after workouts, fats - fishoil - 10pills a day, use olive oil to cook, eat mixed unsalted, unflavoured nuts and ground up flax seeds - 2 tbsp/day, round out the rest of fat intake from meat, a little saturated is ok, if grass fed can be afforded, then it is recomended (as a side note, there are healthy saturated fats - read the new cressy articles).
i want to point out that she may actually be not consuming enough calories (quite likely) and increasing calories will improve the metabolic response to exercise and reverse the problem if that is what it is.
PM me if you have any questions