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.
1 One way to calculate how much water you should drink per day is to take your weight in pounds, divide that by two, and drink that much water in fluid ounces.  While drinking water, to increase the amount drastically, take mouthful of sips and make sure you drink a glass of water in at least 6 or more sips.