Chronic obstructive pulmonary disease (COPD) is more likely to conjure images of breathlessness rather than weak muscles, but can COPD also cause muscle weakness? Research seems to show a correlation.

Joint pain and weakness can be caused by a number of conditions, including acute injuries, infections, and chronic diseases. The outlook depends on the underlying cause. Share on Pinterest Getty ...

Quadriparesis is a condition in which you have muscle weakness in all four of your limbs (both legs and both arms). Also called tetraparesis, this weakness and diminished mobility can be temporary or ...

Weak hip flexors can cause the surrounding muscles to overcompensate, which can cause pain and difficulty walking. Treatment may include physical therapy and exercises. The hip flexors are muscles ...