A vocal warmup should take 15–20 minutes.
If you're a newer singer, or if your performance is early in the day and you haven't spoken much yet,
take an extra five minutes to ensure you cover the full range of breathing, voicing, resonance,
and articulation exercises
Humming is one of the best vocal warm-ups because it doesn't put a lot of strain on your vocal cords. Place the tip of your tongue behind your bottom front teeth and hum up and down the major scale while keeping your mouth closed.
A good vocal warm-up should include
exercises such as inhaling for 4 counts, then exhaling for 8 counts
(and slowly transitioning until the performer can inhale for 1 count and exhale for as long as possible); panting or puffing air are also used to engage in the intercostal muscles.
What are the 5 elements of a vocal warm up?
Your teacher will give you some "go-to's" that are great tools to have in your musical toolbox.
Physical exercise – Get moving!
Breathing exercises – Take a Deep Breath!
Vocalizing: Lip trills and/or tongue trills.
Vocalizing: Vowels.
Vocalizing: Consonants.