Table 1.
Search strategy in PubMed till 20 May 2021 (similar search run in Cochrane Library).
| 1. Elderly [MeSH Terms] OR [All Fields] |
| 2. Elder [MeSH Terms] OR [All Fields] |
| 3. Older [MeSH Terms] OR [All Fields] |
| 4. Aged [MeSH Terms] OR [All Fields] |
| 5. 1 OR 2 OR 3 OR 4 |
| 6. Sarcopenia [MeSH Terms] OR [All Fields] |
| 7. 5 AND 6 |
| 8. Protein intake [MeSH Terms] OR [All Fields] |
| 9. Leucine [MeSH Terms] OR [All Fields] |
| 10. HMB [MeSH Terms] OR [All Fields] |
| 11. β-hydroxy-β-methylbutyric acid [MeSH Terms] OR [All Fields] |
| 12. β-hydroxy-β-methylbutyrate [MeSH Terms] OR [All Fields] |
| 13. 8 OR 9 OR 10 OR 11 OR 12 |
| 14. Muscle mass [MeSH Terms] OR [All Fields] |
| 15. Muscle strength [MeSH Terms] OR [All Fields] |
| 16. Hand grip strength [MeSH Terms] OR [All Fields] |
| 17. Gait speed [MeSH Terms] OR [All Fields] |
| 18. SARC-F questionnaire [MeSH Terms] OR [All Fields] |
| 19. Chair stand test [MeSH Terms] OR [All Fields] |
| 20. Short physical performance battery [MeSH Terms] OR [All Fields] |
| 21. Time up and go test [MeSH Terms] OR [All Fields] |
| 22. 6 min walking test [MeSH Terms] OR [All Fields] |
| 23. 14 OR 15 OR 16 OR 17 OR 18 OR 19 OR 20 OR 21 OR 22 |
| 24. Effect [MeSH Terms] OR [All Fields] |
| 25. Effective [MeSH Terms] OR [All Fields] |
| 26. Effectiveness [MeSH Terms] OR [All Fields] |
| 27. Efficacy [MeSH Terms] OR [All Fields] |
| 28. Improvement [MeSH Terms] OR [All Fields] |
| 29. 24 OR 25 OR 26 OR 27 OR 28 |
| 30. 23 AND 29 |
| 31. 7 AND 13 AND 30 |