Waking up with different sore muscles. one day it's calves, next day it's arms. i don't excersize

Myalgias: If this is new, it is likely some type of viral process and I would anticipate it will resolve. IF this persists polymyalgias can be for various reasons such as autoimmune problem, electrolyte problem, vitamin d def.

Sore muscles: There are lots of reasons why this may be happening. One is fibromyalgia, others are about being out of shape or improper nutrition or rest. Please see your doc for a diagnosis. Something as simple as yoga or stretching MAY be helpful once you know what is going on. Peace and good health.