Home-based Whole Course Multimodal Prehabilitation Based on 5G + Artificial Intelligence Mobile Health

Inclusion Criteria: * Aged 18 years or older * Eastern Cooperative Oncology Group (ECOG) performance status score of 0 or 1 * Histologically confirmation of gastric or gastroesophageal junction (GEJ) adenocarcinoma. For GEJ carcinomas, eligibility is strictly confined to those presenting with Siewert type III tumors or Siewert type II tumors that do not mandate a concurrent thoracotomy * Multidisciplinary team (MDT) referral for neoadjuvant chemotherapy prior to gastrectomy * For female participants of childbearing potential, a negative serum pregnancy test must be confirmed within 7 days prior to the initial administration of neoadjuvant therapy * Capacity to comprehend and voluntarily sign a written informed consent form * Ability to use digital technology (e.g., smart phones, wearable devices) independently or with the assistance of family members Exclusion Criteria: * Distant metastasis * Severe cardiac dysfunction (preoperative LVEF \< 30% or NYHA classification IV), severe liver dysfunction (Child-Pugh C grade), severe kidney dysfunction (preoperative CRRT was received), ASA grade IV or above; 6MWD ≤ 250 meters * Within 6 months before enrollment, the patient had experienced cerebral hemorrhage, cerebral infarction, TIA, or suffered from central nervous system diseases or mental disorders, and was unable to cooperate in completing neoadjuvant therapy and prehabilitation * Presence of severe systemic infections (e.g., multiple organ dysfunction syndrome \[MODS\]) or a…