The researchers wanted to see how the sports drink Powerade stacked up against different kinds of milk, so they subjected 15 men to four rounds of cycling on separate days. Each workout was followed by a different beverage: cow’s milk, soy milk, a milk-based meal supplement or Powerade. Researchers then measured their blood and urine to determine hydration and nutrient levels.
Drinking a milk-based meal supplement after exercise led to better fluid retention than the other drinks, but all of the milk-based products were superior to Powerade in terms of rehydrating the body post-exercise. None of the beverages made the cyclers thirstier than any other.