Nerves and the body

The dry mouth, the shaking hands and the vanishing voice are not character failures — they are a well-described physiological response, and knowing what it is doing makes it manageable.

What is happening

The mechanism.

Perceived threat triggers a sympathetic nervous system response: adrenaline, increased heart rate, redirected blood flow, faster shallower breathing.

Which produces every one of the familiar symptoms, each for an identifiable reason.

Dry mouth: reduced salivation.

Shaking: muscle activation without movement.

Shallow breathing: which directly undermines vocal support.

Tight throat: laryngeal muscle tension.

And a racing mind: heightened arousal narrowing attention.

The breathing intervention

The most effective single measure.

Slow breathing with a longer exhale than inhale increases parasympathetic activity and reduces heart rate, which is well established.

Practical form: in for four, out for six or eight, for two to three minutes.

Done before speaking rather than during, though it can be used in a pause.

And it works better if practised regularly rather than deployed for the first time under pressure.

The physical countermeasures

Symptom by symptom.

Dry mouth: sip water, avoid caffeine beforehand, and a small amount of chewing before you go on stimulates saliva.

Shaking hands: hold something, or use gesture, since movement discharges the activation.

Shaking legs: shift weight, walk deliberately rather than standing rigid.

Tight throat: yawn and sigh, gently, which releases the larynx.

Racing heart: the breathing above, plus accepting it rather than monitoring it.

And moving before speaking — a short brisk walk — which uses the adrenaline productively.

Reframing

The cognitive part with reasonable support.

The physiological state of anxiety and of excitement are similar, and experimental work suggests that labelling the arousal as excitement rather than anxiety improves performance relative to trying to calm down.

Which means "I am excited" said aloud is a better instruction than "relax", since suppressing arousal is difficult and reinterpreting it is not.

And the related reframe: the audience wants the talk to be good, which is true and which changes the perceived threat.

Preparation as the main intervention

The unglamorous answer.

Nothing reduces speaking anxiety as reliably as knowing the material and having rehearsed aloud.

Which means the time spent on relaxation techniques is best spent on a fourth run-through.

Memorising the opening in particular, since the peak of arousal is in the first minute and having something automatic to say carries you through it.

And familiarity with the room, which removes a set of unknowns.

Exposure

What actually changes it over time.

Speaking anxiety reduces with repeated experience, and avoidance maintains it — which is the standard pattern for anxiety generally.

Which means taking small speaking opportunities regularly rather than only the important ones.

Speaking groups, internal presentations, chairing a meeting, asking a question at a conference.

And that the first few are the worst, which is worth knowing in advance.

What does not help

Common measures that backfire.

Alcohol, which impairs delivery more than it reduces anxiety and dries the throat.

Excessive caffeine, which adds to the physiological arousal.

Monitoring your own symptoms while speaking, which increases them.

Trying to suppress the feeling entirely.

Telling yourself the audience will not notice, since they largely will not and this is not a reassurance that works.

And avoiding, which is the most reliable way to keep it.

The audience's perception

A useful fact.

Speakers consistently rate their own visible anxiety as considerably higher than observers do.

Which means the shaking hands and the racing heart are largely invisible, and the sense of being obviously nervous is generally inaccurate.

Recording yourself is the fastest way to establish this for yourself, and it is usually reassuring.

When it is more than nerves

The threshold.

Anxiety that prevents you from taking opportunities, that causes physical symptoms for days beforehand, or that involves panic attacks is worth treating rather than managing.

Cognitive behavioural approaches have good evidence for public speaking anxiety specifically.

Which is a straightforward and effective route, and it is worth taking rather than restructuring a career around avoidance.