In addition, since isometric exercises are done in a static position, they won't help improve speed or athletic performance. They can be useful, however, in enhancing stabilization â maintaining the position of the affected area â since muscles often contract isometrically to aid in stabilization.
Etiology. Most (85-95%) substernal thyroid masses represent benign goiter. Historically, goiters have generally occurred because of iodine deficiency, although this is now observed primarily in developing nations.
Surgical intervention is most often the appropriate treatment for substernal goiter. In cases of apparently benign thyroid disease, the surgery should include the removal of the substernal component and other thyroid tissue responsible for obstructive symptoms. Thus, when possible, surgery can be limited to the removal of a single lobe and the isthmus.