All I can think about is cars and engines that make a positive rebuild. Rebuilding of a structure usually means that it went through hard time or disaster and rebuilding is not alway the easiest of time
Yet in life rebuilding can be getting healthy and gaining energy. Stay healthy and later in life you’ll enjoy it. Of course my life style healthy can be a bit of a chore between unhealthy events. I still try to find enough time to rebuild the system.