More complicated testing includes measurement of lung volumes; lung, chest wall, and respiratory system compliance (which requires measurement of esophageal pressure); and complete cardiopulmonary exercise testing.
The suggested serving size of sour cream is 1 tbsp. This serving size contains 31 calories, and 27 of those calories are from fat. Sour cream has less than 1 g of carbohydrates and 3 g of fat, which is 5 percent of the recommended amount per day. There are nearly 2 g of saturated fat, which is 9 percent of the amount recommended per day.
The estimated figures to the right are based on the fact that one packet or one rounded teaspoon of sugar has 25 calories. One tablespoon of light cream has approximately 30 calories. Incidentally, one flavored creamer has 40 calories and one tablespoon of whole milk has 10.