How Posture Effecting Your Singing Method

Posture
The singing process functions best when certain physical conditions of the body exist. The ability to move air in and out of the body freely and to obtain the needed quantity of air can be seriously affected by the posture of the various parts of the breathing mechanism. A sunken chest position will limit the capacity of the lungs, and a tense abdominal wall will inhibit the downward travel of the diaphragm. Good posture allows the breathing mechanism to fulfill its basic function efficiently without any undue expenditure of energy. Good posture also makes it easier to initiate phonation and to tune the resonators as proper alignment prevents unnecessary tension in the body. Vocal pedagogists have also noted that when singers assume good posture it often provides them with a greater sense of self assurance and poise while performing. Audiences also tend to respond better to singers with good posture. Habitual good posture also ultimately improves the overall health of the body by enabling better blood circulation and preventing fatigue and stress on the body.

There are eight components of the ideal singing posture:
- Feet slightly apart
- Legs straight but knees unlocked
- Hips facing straight forward
- Spine aligned
- Abdomen flat
- Chest comfortably forward
- Shoulders down and back
- Head facing straight forward

Breathing and breath support
Natural breathing has three stages: a breathing-in period, a breathing out period, and a resting or recovery period; these stages are not usually consciously controlled. Within singing there are four stages of breathing: a breathing-in period (inhalation); a setting up controls period (suspension);a controlled exhalation period (phonation); and a recovery period.
These stages must be under conscious control by the singer until they become conditioned reflexes. Many singers abandon conscious controls before their reflexes are fully conditioned which ultimately leads to chronic vocal problems

Source：
http://en.wikipedia.org/wiki/Singing