The Effects of the Yi Jin Jing on the Muscles and Bones of Adults

Observation of the effects of Yi Jin Jing on the muscles and bones of adults

Inclusion Criteria: * Age 18-90 years inclusive; * Generally healthy, no acute or chronic diseases affecting major organ functions; * No cognitive impairment, able to understand and comply with study procedures; * Willing and able to provide written informed consent; * No pregnancy or lactation (for females); * No recent (within 3 months) major surgery, hospitalization, or significant weight change (\>5% body weight). Exclusion Criteria: * Presence of acute or unstable chronic diseases (e.g., uncontrolled hypertension, diabetes, heart failure, or malignancy); * Severe cognitive impairment, psychiatric disorders, or inability to follow study instructions; * Recent (≤3 months) major surgery, trauma, or hospitalization; * Pregnancy, lactation, or childbearing potential without reliable contraception; * Body mass index (BMI) \40 kg/m²; * Current use of medications affecting muscle or nutritional metabolism (e.g., corticosteroids, anabolic steroids); * Participation in another interventional trial within 30 days.