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.
A more efficient way to determine how much water you need every day is taking your current body weight, dividing it in half and then drinking that amount of water in ounces. For example, if you weight 140 lbs, you should be drinking about 70 ounces of water a day, which is a good 4-5 filled water bottles (depending on how much water your water bottle carries). If you are an active person, consider dividing your current body weight by 2/3, instead of 1/2. For example, if you weigh 140 lbs and are super active, you should be drinking about 93 ounces of water a day. Water is absolutely KEY to survival.