What causes tight, aching muscles?
Everyday muscle tightness usually traces back to how a body has been used: a longer walk or workout than usual, hours held in one position, repetitive work with the hands or arms, poor sleep, or a stretch of unusually high stress.
It shows up as soreness that lingers past a day or two, a heaviness in the limbs, restricted movement in a particular direction, or a general sense of being physically braced.
