The most reliable symptom of an underactive thyroid gland is a relentless coldness in the centre of the body. What's interesting is that cold hands and feet, especially indoors or in a warm environment, are not a reliable sign of hypothyroidism.
sit on someone or something. 1. Lit. to place oneself in a sitting position on someone or something. The enormous woman knocked the crook out and sat on him until the police came. I need to sit on this chair for a minute and catch my breath. 2. Fig. to hold someone or something back; to delay someone or something. The project cannot be finished because the city council is sitting on the final approval. Ann deserves to be promoted, but the manager is sitting on her because of a disagreement.
A young man performing sit ups at the gym. Sit ups are an effective exercise to strengthen and tone your abdominal muscles, but the stress they put on your muscles and digestive system can cause pain. Severe pain can indicate issues including cramps, a strained muscle, and problems with your stomach and intestines.