As you go down a hill, you speed up, your stride lengthen, and thus your impact on the ground increases. There's also an increased risk of muscle soreness later. Most people think of calcium when they hear about dairy products. Surprisingly, dairy products have several other nutritional qualities. This is equivalent to 1 ounce of meat.
Potassium is also plentiful in dairy products.
Eight ounces of milk has almost as much potassium as a banana. Vitamins A and D are found in milk, as well. These nutrients do not differ among the various types of milk. Adequate calcium and potassium can act to improve high blood pressure. An added benefit of cheese and yogurt is that those people who are lactose intolerant can usually consume moderate amounts of these products without problems.