You have an increased need for potassium because Lasix forces your body to excrete excess water to help decrease your blood pressure. When the water is excreted, Lasix causes potassium to go with it.
Potassium is also necessary for water balance and is found inside of every cell in your body. The potassium inside the cells balances the sodium outside the cells to maintain pressure and water balance in the body. Otherwise, if either the potassium or the sodium is high or either low or one high and the other one low, a pooling of water or dehydration can occur. Not what you want going into a competition.
Look out for the obvious symptoms of low potassium levels are tiredness, muscle weakness and heart muscle irritability.
As the dosage of a Lasix is increased, the likelihood of low blood potassium will increase.
Be sure to take Potassium and try to get your bloodwork checked for Potassium and Sodium levels before, durng and after if possible.
Some foods that are high in potassium are: one-half cup of orange juice, one large banana, one baked potato, one-half winter squash, one cup tomato juice, one cup vegetable juice cocktail, one-half cup avocado, one-half cup cooked dried beans and one tablespoon black strap molasses.