Tips on how to expand your vocal range

According to Jeannie Deva, founder of Jeannie Deva® Voice Studios in Los Angeles, the five primary physical causes of throat muscle tension are:

1) Lack of adequate vocal warm-up
2) Air over-blow
3) Over articulation (emphasizing mouth, lip movements when singing or talking)
4) Using force rather than resonance for volume
5) Trying to compensate for under-developed vocal muscles