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 Your weight: The first step to knowing how much water to drink everyday is to know your weight. 2  The amount of water a person should drink varies on their weight, which makes sense because the more someone weighs the more water they need to drink. You should add 12 ounces of water to your daily total for every 30 minutes that you work out. 2  So if you work out for 45 minutes daily, you would add 18 ounces of water to your daily intake.