Tight back muscles are sometimes an indicator of imminent back pain. Other times, tightness is a chronic concern that can create worry and discomfort for a very long time-frame.
Mule deer range from 3 to 3-1/2 feet tall at the shoulder, 4-1/2 to 7 feet long and have a tail that is 5 to 8 inches long. They can weigh between 130-280 pounds. The female deer are smaller than the male.
As for mule deer, they are the big walkers. For example, in northeast Montana where I hunt most every year, biologists from Fish, Wildlife & Parks have tracked mule deer moving an average of 64 miles from winter range west of Glasgow, Montana to summer fawning areas up in Saskatchewan.