The Interaction Between Resting Metabolic Rate, Physical Activity and Thyroid Hormone in Females

Inclusion Criteria: * Female age ≥18; * BMI≥18.5 Exclusion Criteria: * Intended weight change exceeding 2kg within the past three months; * Having any special medical diets or having eating disorders; * Pregnant women or breastfeeding women; * People who have metal implants in their bodies; * Patients with metabolic diseases, infectious diseases, and genetic disorders such as hypothyroidism, and hyperthyroidism; * Patients with a personal or family history of medullary thyroid carcinoma (MTC), or patients with rare type 2 multiple endocrine tumor syndrome (MEN2); People with a fear of needles (Trypanophobia), claustrophobia; People who are fear of blood (Hemophobia) or pathological hypotension;