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.
To calculate exactly how much water that is, use this equation: Your above result in ounces + (X minutes of exercise Ã· 30) x 12 ounces = ounces of water you should drink per day. Are You Drinking Enough Water for Your Diet? Your diet plays a big role in your water intake.