Muscle atrophy can also happen if you are bedridden or unable to move certain body parts due to a medical condition. Astronauts, for example, can also experience some muscle atrophy after a few days of weightlessness. Other causes for muscle atrophy include: 1  lack of physical activity for an extended period of time. 2  aging.  alcohol-associated myopathy, a pain and weakness in muscles due to excessive drinking over long periods of time.
In addition, TSH tests are used to help diagnose a condition called subclinical hypothyroidism, which usually causes no outward signs or symptoms. In this condition, you have normal blood levels of triiodothyronine and thyroxine, but higher than normal levels of TSH. Nov. 10, 2015.
*The American Association of Clinical Endocrinologists and the American Thyroid Association recommend TSH levels between 0.45 and 4.12 mlU/L. A TSH test is used to check the level of thyroid-stimulating hormone in the blood. Your TSH level can indicate if your thyroid gland is working properly. While a TSH test is usually used as the initial blood test to detect hypothyroidism, the doctor may need to order additional tests to diagnose hypothyroidism. The doctor also may check your level of FT4, or free thyroxine, which is the amount of thyroxine in your body.