Since water is a major part of your body, it is no surprise that a good amount of water is needed to stay fit and achieve a jacked physique. Water is necessary according to research by the National Center for Biotechnology Information. The report published by the organization reveals that even 3% of water-loss reduces muscular endurance and affects your performance during weight lifting exercises. This clearly means that even if you’re trying to achieve a muscular body, without a sufficient amount of water, you lift less weight than your actual potential.