Controlled breathing for singing requires the use of many body parts. This includes the diaphragm, ribcage, lungs and chest. To inhale as much air as possible while singing, your diaphragm should move downward and the ribcage should expand. This will provide more room for the lungs to receive the maximum amount of air.
Singing without controlling the air flow through your body can cause your tone to be weak and strained. Often this is displayed by the singer's chest moving up and down. The proper way to control your breath is to expand your ribs while inhaling; less expansion should occur with the upper abdominal muscle. The muscles in the middle and lower part of the back should also expand. This not only controls the amount of air but the speed at which it moves.
Sitting or standing with a proper posture will help your breathing remain consistent and under control while singing. To produce a quality tone, your chin and head should be level and your neck muscle should remain loose. Hold your chest upright and back straight. By using these tips for posture while singing, your lungs will be able to inhale a larger amount of air, which will help your voice remain strong throughout the song.
Keep your voice from getting tired or strained by inhaling silently. If your breath inward makes a noise while singing, the vocal cords are being unnecessarily used. When possible, breathe in through your nose when you are singing a song. This will provide moisture to your vocal cords. It will also help keep your voice strong and clear.