Control body temperature
One of the advantages of water is that it helps to regulate body temperature. When you exercise frequently, your body's metabolic activity increase, producing a lot of heat. When in a heated setting, for example. Sweating is necessary to keep your body stable. Water is the primary component of sweat. Your body temperature increases without cooling, resulting in heat stroke. Heatstroke is another term for it. You have several headaches, tinnitus, dizziness, vertigo, and your entire body is heated. Fainting or even death might occur in extreme situations.
Therefore, when working in a high-temperature environment, the body sweats a lot. You should regularly replenish water, even when you are not thirsty. Filtered water is good enough, but it's better if you drink water with added electrolytes. For example, juice, water with salt,... Because in sweat lost, in addition to water there is also salt - also necessary for the body.