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.
Eight 8-ounce glasses of water a day. Another approach to water intake is the 8 x 8 rule drink eight 8-ounce glasses of water a day (about 1.9 liters).The rule could also be stated, drink eight 8-ounce glasses of fluid a day, as all fluids count toward the daily total.Though this approach isn't supported by scientific evidence, many people use this basic rule as a guideline for how much water and other fluids to drink.Dietary recommendations.he rule could also be stated, drink eight 8-ounce glasses of fluid a day, as all fluids count toward the daily total. Though this approach isn't supported by scientific evidence, many people use this basic rule as a guideline for how much water and other fluids to drink. Dietary recommendations.