衰弱是一种常见的重要老年综合征,表现为机体的脆弱性增加,维持稳态的能力下降,面对各种应激时,发病和死亡的风险增加。其核心特点是多个生理系统(神经肌肉、代谢及免疫系统等)的储备功能下降。衰弱不仅是躯体功能障碍,也可以是心理障碍。衰弱可以与失能及疾(共)病相关,但不等同于失能和疾病。衰弱老年人 Weakness is a common and important senile syndrome characterized by increased vulnerability and reduced ability to maintain homeostasis and increased risk of morbidity and mortality in the face of various stress conditions. Its core feature is a decrease in the reserve function of multiple physiological systems (neuromuscular, metabolic and immune systems, etc.). Weakness is not only physical dysfunction, it can be a psychological disorder. Weakness can be related to disability and disease (comorbidity), but not the same as disability and disease. Elderly people