I switched from a company that only used the newer power stretchers to a company that doesn't have any power stretchers. I'm fairly new to the field and not used to the whole lifting the stretcher thing yet I guess. I've been having soreness in my lower back usually midway through my work days and contiune still the end of the shift. Usually gone by the morning... Is this normal and just from my body not being used to all the lifting. Or did I maybe hurt myself? It's not pain that prevents me from moving or doing anything, just sore.