After years of hauling 80-100 pound speaker cabinets and living off adrenaline...

https://equatemagazine.com/what-a-tour-actually-does-to-a-musicians-body/

After years of hauling 80-100 pound speaker cabinets and living off adrenaline until 2 or 3 a.m., musicians develop a kind of body awareness you won’t find in a gym