Construction and Effect Evaluation of the Low Load Blood Flow Restriction Training Program for Lung Cancer Patients Complicated With Sarcopenia During Chemotherapy

Inclusion Criteria: * The pathological diagnosis is lung cancer, and the diagnostic criteria refer to the 2023 edition of the Clinical Diagnosis and Treatment Guidelines for Lung Cancer of the Chinese Medical Association. * Diagnosed as sarcopenia, the diagnostic criteria refer to the 2023 version of the Expert Consensus on the Diagnosis and Treatment of sarcopenia in the Elderly in China. * Chemotherapy has been carried out and the remaining chemotherapy frequency is ≥ 4 times. * Physical disability free, Eastern Cooperative Oncology Group Performance Status (ECOG PS) ≤ 2 points * No language communication barriers, able to cooperate in completing scale assessments * Expected life\>6 months * Previous irregular exercise habits * Patients and their families have informed consent and voluntarily join * A person who has a smartphone and can complete WeChat check-in Exclusion Criteria: * Merge with other malignant tumors * There are contraindications or symptoms or diseases that affect exercise, such as uncontrolled hypertension, venous thrombosis, infection, platelet count\<50 × 109/L, white blood cell count\<3.0 × 109/L, hemoglobin\<10 mg/dL, bleeding tendency, arrhythmia, heart failure, unstable angina, heart valve disease, chronic obstructive pulmonary disease, asthma, limb dysfunction, severe muscle, bone and joint diseases, etc * The risk factor score table for blood flow restriction training scores\>2 * During rest, blood oxygen saturation ≤ 90% * Cannot conduct human body composition analyzer testing, such as for patients with cardiovascular stent implantation, pacemaker equipped, artificial joint replacement, or amputation * Patients carrying PICC * Patients with cognitive impairment and mental illness * Patients with planned weight loss