The thyroid gland is a central metabolic organ whose hormones triiodothyronine (T3) and tetraiodothyroxine (T4) are responsible for the speed of metabolic processes. These hormones increase oxygen consumption, boost energy metabolism, increase heat production, increase the effectiveness of other hormones (insulin, adrenaline, growth hormone) and promote the growth, development and maturation of the brain and bones. In addition, thyroid hormones are responsible for metabolic adaptation to training stimuli - so without hormones there is no adaptation. After a partial thyroidectomy, as in your case, the thyroid hormone is usually substituted, i.e. given as medication to prevent a deficiency. This substitution is controlled via the level of the regulatory hormone (TSH), which is produced in the pituitary gland. There is a control loop here: if there is sufficient thyroid hormone in the blood, the production of TSH is suppressed; if there is too little, TSH stimulates thyroid growth. The production of the two thyroid hormones T3 and T4 is in turn dependent on the iodine content of the blood, as both hormones contain iodine. If your hormone supplementation is well adjusted (TSH level in the normal range), you can also train intensively without any restrictions or concerns.
