A lot of people say that vocal warm-ups are for "warming up the voice" - stretching the vocal muscles, removing excess phlegm, reducing risk of injury, etc., etc. And while that is generally true, I think that warm-ups for choir have a more important role: they provide a chance for us to hone in on teaching vocal technique to our singers.
Every rehearsal, I spend about 15-20 minutes on choral warm-ups (yes, I really do!) addressing various issues in vocal technique that I see and hear from my singers. This helps them build a solid vocal foundation for singing that can then be applied to their music.
In my opinion, a good choral warm-up should include at least one exercise from each of the following categories.
Singing is a physical process so warming up the body is important. Start the rehearsal off with light stretching/massaging, getting grounded, and aligning the posture for singing.
Examples of physical exercises:
Once the body is warm and stretched out, breath is the next thing to work. Breath is critical for singing as it is the "generator" for our instrument so we should strive to always include at least one breathing exercise in our warm-ups.
Examples of breathing exercises:
In layman's terms, I describe phonation as the point which the vocal folds touch and begin to oscillate/vibrate. The challenge with phonation is finding the right amount of pressure. I primarily work with singers to avoid adding too much pressure (which is often the issue). So, I focus on exercises that have a light amount of pressure, just enough for the folds to oscillate.
Examples of phonation exercises:
Resonance is essentially the way we use the space or cavities in our body to mold the sound we produce. You can control the resonance by placing the sound more in your chest, mouth, nasal area, or head, for example. Helping singers explore their various resonance chambers will allow them more control over the sounds they produce, help them with placement across their registers, and give you more options for expression and musicality in your repertoire.
Examples of resonance exercises:
Our vocal articulators include our tongue, teeth, lips, jaw, and soft palate. As singers, we need to work our articulators so that we can not only sing our lyrics but also to help us with correct placement of consonants and vowels. Many exercises listed above will also help with articulation such as lip bubbling/trills or humming.
Examples of articulation exercises:
I don't consider register in its own category since you can work it within several of the categories above. But I always like to include some register exercises so that singers can play within different areas of their voice and try to maintain a consistent sound across their registers.
Examples of register exercises:
How are your choral warm-ups structured and what are your favorite vocal exercises? Let us know in the comments!