Everyone knows that one colleague who runs into the rehearsal last minute and without any warm-up sings their part rightaway, and very well. Why does he get away with it while other has to do scales for thirty minutes before they can produce a decent sound? What is the reason, and is any of them doing something wrong? Why do we even warm up, what is the goal – and how does it change as years go by? What is the readiness state, the muscle tone, and what tennis and singing have in common? And what’s the deal with the air humidifier, herbal candies and all other “singer whims”, for example in the heating season?