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.
Divide your weight by 2 to find out how much water you should drink on a daily basis. For instance, if you weigh 170 pounds: 1/2 = 85 pounds. This means that a person who weighs 170 pounds should drink 85 ounces of water every day. Activity level.