Weakness and visible wasting of the quadriceps muscles (the large muscles on the front part of the thighs.) Weakness of the lower leg muscles, below the knees.
[my.clevelandclinic.org]
Signs and symptoms: Marked weakness in the muscles closest to the center of the body, like the forearms, thighs, hips, shoulders, neck, and back Sometimes, weakness in the
[myositis.org]
[…] of both thighs.
[ncbi.nlm.nih.gov]