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.
The oft-quoted standard recommendation for how much water a person should drink in one day is at least 8 cups, or 64 ounces, according to a 2009 article published online in Scientific American, but the actual amount required varies from individual to individual.