One from the reasons people get in touch is due to lack of air in the podium, inside the webinar, or perhaps a sales presentation. So I have a question to suit your needs.

Do you ever experience breathlessness a lot more conversation with family, friends or colleagues?

More than likely, your solution is No unless you might be very excited.
So what's happening in public places speaking that triggers that you gasp for air and always seem like you happen to be running on empty? There are three possibilities.

You are nervous. Nervousness can sap your oxygen.
You still believe whatever you learned in elementary school: you just aren't able to breathe until you visit some type of punctuation.
You don't make sure to breathe.

Nervousness may be your best friend or perhaps your worst enemy in public speaking. If this article is in control, then its definitely not helping you as it increases your panic. This, subsequently, places you within the flight or freeze mode. In either one of these states, your upper chest breathing feeds your panic as opposed to alleviating it.
While your 2nd grade teacher could have said never to take a breath before you came to the final with the sentence, she had her reasons for saying so. The problem came later in school when you had several lines of sentence with no punctuation. You have something referred to as the 'speaker's license.' Similar to the 'writer's license,' the previous signifies that you'll be able to breathe almost anywhere is any sentence. Just as you supplement your air supply in normal conversation, so too should you supplement your air in public speaking. What happens with the lectern, for instance, is the fact that we wait until we are totally spent before gasping to get a quite a bit of air which actually creates more tension than relief. The secret? Supplement your air supply before you run out from it. Another way to look at this is always to maintain your 'balloon' filled instead of empty.
It is interesting that the a very important factor many novice public speakers don't even think to do would be to breathe. Breathing will be the last deliberation over their mind when, in reality, breathing must be each of your priorities. When you pause, take a quick breath. Before you open your mouth to talk, take a breath. And, if you want to complete it really well, discover how to breathe with all the support of your diaphragm. It could be the best means of determining your nervousness in any form of public speaking.