concentric contraction, a common form of muscle contraction that occurs in rhythmic activities when the muscle fibers shorten as tension develops. Compare eccentric contraction. See also isotonic exercise.
1 Multiply by 2/3: Next you want to multiple your weight by 2/3 (or 67%) to determine how much water to drink daily. 2  For example, if you weighed 175 pounds you would multiple that by 2/3 and learn you should be drinking about 117 ounces of water every day.
Here is a little weight based formula to help you to figure out how much water you should be drinking daily. 1  Take your current weight and divide by two. 2  Take that number and drink that many ounces of water a day. 3  So if you weigh 130 pounds you should drink 65 ounces of water a day.