Nutrition and Exercise Interventions During Hospitalization in Frail or Sarcopenic Patients: A Scoping Review of...

Background/Objectives: Frailty and sarcopenia are common among hospitalized patients and are associated with poor clinical outcomes. Nutritional and exercise interventions are widely used to prevent muscle loss and functional decline; however, their independent and incremental effects remain unclear. This scoping review aimed to systematically map the characteristics and reported effects of these interventions during hospitalization. Methods: This scoping review followed the Joanna Briggs Institute methodology and the PRISMA-ScR guidelines. A comprehensive literature search was conducted in PubMed/MEDLINE, EMBASE, CENTRAL, and PEDro. Eligible studies included adult hospitalized patients receiving nutritional interventions, exercise interventions, or both. Interventions were categorized into four groups: no intervention, nutrition alone, exercise alone, and combined interventions. Data regarding study characteristics, intervention details, and clinical outcomes were extracted and descriptively summarized. Results: Thirty-three studies were included. Considerable heterogeneity was observed in patient populations, intervention characteristics, and outcome measures. Most studies evaluated configurations including an exercise component (exercise alone or combined nutrition-exercise), whereas studies isolating nutrition or providing direct head-to-head comparisons between combined and single-component configurations were limited. Intervention dose and reporting were highly variable across studies. Conclusions: Current evidence on the effects of nutritional and exercise interventions during hospitalization remains heterogeneous and limited. Future studies should adopt standardized intervention reporting and directly compare combined and single-component strategies to determine additive and synergistic effects in patients with frailty or sarcopenia.