Volteretas literally translates to "somersaults" or "flips." It's a playful and dynamic word that evokes a sense of movement and freedom.
In the song, Laura Pausini sings, "A veces me elevo, doy mil volteretas" (Sometimes I rise, I do a thousand somersaults). This imagery suggests a feeling of liberation and joy, especially in the context of the song's theme of being truly oneself "cuando nadie me ve" (when no one sees me). It's a unique and memorable way to express emotional highs.
The whole song runs on "a veces" (sometimes), and it uses the word like a shrug. "A veces me elevo, doy mil volteretas" (sometimes I rise, I do a thousand somersaults) sits one line above "A veces me encierro tras puertas abiertas" (sometimes I lock myself behind open doors), and the second image is the better one. The doors are open. She shuts herself in anyway. By the time she reaches "A veces soy tuya y a veces de nadie" (sometimes I'm yours and sometimes nobody's), you can hear the terms she is offering, and they are not generous ones.
The chorus explains why she wants them. "Cuando nadie me ve puedo ser o no ser" (when nobody sees me I can be or not be) is the version of her with no audience, and "no me limita la piel" (my skin doesn't limit me) is what that freedom costs to give up. The last verse asks for it outright: "No enciendas las luces que tengo desnudos / El alma y el cuerpo" (don't turn on the lights, my soul and my body are naked). Alejandro Sanz wrote the song and sang it about himself. Pausini keeps every image and moves one vowel, "soy tuyo" to "soy tuya", and it becomes a different confession.