Bands

I don't know how bands do what they do for as long as they do. I don't know how they perform at concerts night in and night out. How do they have their voices each night? How are they not deaf? Every concert is extremely loud. The speakers they have so everyone can hear are huge. The put a ton of effort into singing each night. Although they use microphones, they still have to sing very loudly and with lots of energy. Some bands perform hundreds of times in a year. How do they not get exhausted and/or sick? It's a grind. They work tremendously hard all of the time. I just don't understand how they can perform at that level for many, many years. It's truly amazing and I have so much admiration for them.