It shall be noted that these results were obtained during a student lab with a fixed protocol. In addition to wearing a weight vest the students also received one of the following treatments: one liter of water orally, one liter of water orally and oral administration of a vasopressin analogue called Minirin© (desmopressin, 60 µg), a loop diuretic called Furix© (furosemide, 40 mg) or one liter water orally and eight tablets of Resorb© which is a rehydration therapy. The multiple treatments and the fixed protocol are confounders and support the repetition of these experiments with a more suitable design.