It also allows you to program muscular responses. These muscular responses are then activated when the music demands it. Exercise requires oxygen intake, which in turn stimulates the production of the body's own mood-lifting endorphins. So ultimately, singing these exercises should benefit you mentally as well as vocally. You need to be properly hydrated for your voice to function efficiently, so drink plenty of fluids, preferably one to two quarts a day.
Some fluids adversely affect the voice.
Avoid coffee and other caffeinated beverages, as well as soft drinks that contain large amounts of sodium. These dehydrate your whole system, which in turn causes dry throat. Avoid abusing your voice. You can overuse the voice just as you can overwork any muscle in your body. If you have a cold, a sore throat, or hoarseness, avoid singing unless your teacher or your doctor tells you otherwise.