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.
Is there a specific equation to figure out how much I should drink? The Institute of Medicine recommends that adult women consume 2.7 L (91 oz) of total water per day, and adult men consume 3.7 L (125 oz). However, this is total water, so those numbers include that which you consume in the food you eat. Since the average American consumes around 20% of their water needs through food, that leaves 2.2 L (74 oz = 9 cups) for women and 3 L (101 oz = 13 cups) for men.