Lack of excitement can easily spread to the audience.
Do you feel sleepy, lethargic, tired? Maybe you are not feeling well or running a fever. Don’t let malaise show in your performance. The audience is psychic. They’ll feel the lack of enthusiasm a mile away.
Inject energy into your performance even if your biorhythm is off. Even if you are feeling down and low, rev your energy up. Your audience will reward you for keeping their interest high in your performance.