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.
Multinodular goiter; MNG; nodular goitre. The thyroid gland is a butterfly-shaped gland sitting in the front of the neck. It is responsible for the production and release of thyroid hormones. Any increase in the size of a part or whole of the thyroid gland is called a goitre. For more information see the article on goitre.