When you step into the spotlight, your primitive survival part of the brain can’t distinguish between the threat of a predator, like a bear or a tiger, and a room full of executives or colleagues. It activates the sympathetic nervous system, flooding your bloodstream with adrenaline and cortisol. This physiological cocktail prepares your muscles for a fight or running away that will never happen. It results in trembling hands, shaky knees, and a cracking voice.
1. Why does our voice tremble?
Vocal cord tightness and tension
Stress causes a sudden surge of adrenaline and cortisol, leading to immediate muscle tension throughout the body. This includes the tiny muscles of your neck, larynx, and vocal cords. When vocal cords are unnaturally constricted, they lose their elasticity. Instead of vibrating smoothly as air passes through, they begin to quiver spasmodically, just as your hands shake when you’re nervous. It is similar with a string instrument. If you have a guitar, banjo, or violin scattered somewhere in the attic or basement, try adjusting the string tension and observe what happens.
Shifting to shallow chest breathing
When we are not used to costal-diaphragmatic breathing (aka breathing with your belly) but instead use shallow chest breathing, you have significantly less air available. When you try to speak a long sentence on the last drops of breath, you force your body to push words out under high pressure. This uneven airflow colliding with a tense throat creates turbulence, which we hear as a trembling voice.
Lack of proper hydration
Adrenaline suppresses the digestive system, which immediately results in a drop in saliva production (hence the dry mouth feeling when stressed). Dry vocal folds create greater friction and are more prone to irregular vibrations, amplifying the shaky, cracking effect.
2. How to deal with a trembling voice?
Breathing
When anxiety strikes, your body reflexively switches to shallow chest breathing, which signals to the brain that you are in immediate danger, maintaining the panic loop.
By switching to diaphragmatic breathing (belly breathing, where your ribs expand), you engage the lower lobes of your lungs, where gas exchange is most efficient. The rise of the belly stimulates receptors directly connected to the vagus nerve. This prompts the brain to release calming neurotransmitters, such as GABA and serotonin, almost instantly lowering your heart rate and blood pressure.
Important note! Do not attempt diaphragmatic breathing for the first time while standing backstage. Your nervous system cannot learn new patterns while you are in full “fight-or-flight” mode.
Start practicing in advance for a few minutes a day. If you need support, feel free to contact me.
Important note! Do not attempt diaphragmatic breathing for the first time while standing backstage. Your nervous system cannot learn new patterns while you are in full “fight-or-flight” mode.
Start practicing in advance for a few minutes a day. If you need support, feel free to contact me.
3. Trembling voice
A shaky voice rises and falls unexpectedly because adrenaline tenses up throat muscles. Correct this using the following techniques:
Slowing down
Speaking fast amplifies the perception of trembling. Speaking slowly gives your vocal cords more time to recover, makes you sound compelling, and gives your parasympathetic nervous system time to respond. Slowing down also gives you more time to breathe; as a result, it is easier to regulate stress, hence decreasing the trembling voice symptoms.
Vocal warm-up
Dedicating a few minutes to humming, reading aloud, or practicing tongue twisters serves as an effective vocal warm-up. Additionally, perform a gentle massage on your face, jaw, and neck, as these areas tend to tighten during speech.
Body posture
Stand tall with relaxed, open shoulders. Proper posture facilitates the work of your diaphragm, improves airflow, and naturally reduces physical tension.
Voice stabilizer
If you struggle with a shaky voice, inhale slowly through your nose for 4 seconds, hold for 2 seconds, and then focus on releasing the air slowly while speaking your words. This stabilizes airflow across the vocal cords.
Relaxation techniques
Relaxation techniques are a topic well worth exploring. There are many methods available, so everyone can find something that works for them. You can practice them just before a presentation or, ideally, repeat them regularly on a daily basis to train your nervous system to calm itself down. Here you will find a post covering various methods you can try.
One final tip
If you feel your voice starting to shake, take a deep diaphragmatic breath and exhale slowly while consciously dropping your jaw (leaving your lips slightly parted). This sends a signal to your brain that everything is fine and you don’t need to run.
4. Master stress once and for all
The techniques outlined above can significantly help you manage a shaky voice, but remember that they only treat the symptoms.
If you want to learn how to manage stress once and for all and reduce overall stage fright, which, in the long run, will minimize physiological stress symptoms like trembling hands, book 1-on-1 sessions with me or check out this course.
Author:
Hi, I’m Magda Kern. I’m a psychologist, the top 11 public speaking coach worldwide, a lecturer, working for companies from the Fortune 500 list, a business trainer with 12 years of experience, a TEDx coach, and an ex-vocalist based in Switzerland. I help people prepare and deliver unforgettable presentations and deal with stress.