Stance Your stance tells the audience how you feel. Upward movements convey enthusiasm and energy. Downward movements suggest weariness and discouragement. You communicate via your posture before you even say the first words. You want to avoid shuffling to the lectern as if you anticipated an execution.
Most people learn how to smile to their advantage for the camera at any early age.
They can do it on cue. Stance includes your walk. Start by determining what is your relaxed stance by observing yourself in the mirror or on video. After you learn the stance, learn the related walk. Actually, this is fairly easy because most of the time you are unconsciously relaxed.