As with athletes, or anybody performing a strenuous physical task, warming-up is an essential procedure for singers. All the muscles used in singing need to be brought gradually to a peak of efficiency, and the systems which lubricate the vocal folds need to be alerted to the task ahead.
Singers acquire their own programmes of vocalisations and exercises with which to warm up the voice. Here they work slowly towards the notes at the extremes of the range, as these put the vocal system under most pressure.
To sing without warming-up results at best in a creaky voice and forced singing, with notes missing or jumping at the top of the voice. At worst, it can cause damage to the vocal folds, as can shouting or screaming when the voice is cold. The system needs to be well-oiled and ΓÇ£warmΓÇ¥ to find the easy, natural resonances that are the sign of a mature classical singing voice.
Discipline is equally important after a singing session. The vocal folds and other muscles, when warm after exertion, are particularly sensitive, and can be damaged by sudden cold or by air-bone irritants and infections.
Classical singers should avoid at all times, particularly, when the voice is cold.
