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.
How to figure out how much alkaline water to drink. For example: I weigh 138 pounds. Divide that in half and you end up with 69. That means I should drink 69 ounces of water per day normally. Add 16 ounces of water for every hour that you work out to replace the water you lose.