When giving a presentation it is important to use your energy. Make sure that your energy is kept up throughout your presentation. For example, the moment you start to talk it should be at an 8 or 9. If it drops, remember to boost it up again, regularly.
Most people have a natural/resting energy of around 6/7 so you will need to increase this when presenting. Done well you will also give your audience your energy and inspire them too.