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.
So if you weigh 200 pounds, then multiply 200 by 2/3. That gives you an approximate figure of133. You should be drinking around 133 ounces of water every day. Now is when we take into consideration the amount of exercise you do. If you workout for thirty minutes a day, then you should drink an extra 12 ounces of water.