Bioindicators Associated With Sarcopenia Before and After Intensive Lifestyle Intervention

The goal of this clinical trial is to explore whether the bioindicators of body composition, nutrition-related indicators (lymphocytes, albumin), lipids, and thyroid hormones are associated with sarcopenia and the changes in these indicators after an intensive lifestyle intervention. The main questions it aims to answer are: * whether the bioindicators such as lymphocytes, albumin, lipids, thyroid hormones, fat mass, fat-free mass, and basal metabolic mass are associated with the development of sarcopenia. * the changes of these bioindicators that occur in older adults after going through an intensive intervention. Participants will receive a 3-month intensive intervention consisting of an intensive nutritional intervention and an individually designed exercise intervention. Nutritional and exercise prescriptions are co-designed through a nutritionist and rehabilitation physician. Researchers will compare bioindicators in the sarcopenia group before and after intensive lifestyle intervention to determine the association with sarcopenia.