"Your larynx is like any other muscle in the body – it gets stronger with use but it also gets tired too. Treat your voice like a long distance runner treats his/her legs. You would not expect an athlete to train for a marathon all day and then go to the gym for a leg workout in the evening would you? The same applies to the voice."
METAMIA is a free database of analogy and metaphor. Anyone can contribute or search. The subject matter can be anything. Science is popular, but poetry is encouraged. The goal is to integrate our fluid muses with the stark literalism of a relational database. Metamia is like a girdle for your muses, a cognitive girdle.