A core tenet of evidence synthesis reviews is reducing biases, and a comprehensive literature search is foundational to reducing bias. A comprehensive literature search cannot be dependent on a single database, nor on bibliographic databases (e.g., PubMed, Embase, Scopus, etc.) only.
Source: NIH
It is recommended to search all three of these science databases. It might also be a good idea to search in a subject specific database.
Provides access to the Medline database and other biomedical sources. Medline is a worldwide Index to medical literature (including sports medicine) and supporting disciplines (including human nutrition and animal science). Look for the "Find IT!" button after clicking on the title of the desired article. Access the public version of PubMed here.
Scopus is Elsevier's abstracting and indexing database that indexes content from thousands of scholarly books, journals, and conference proceedings over a wide range of disciplines. Scopus also provides access to detailed author profiles and analytical tools to compare journals, citation impact, and citation trends.
In addition to the Science Databases, it might be a good idea to search the following databases which are more subject specific
SPORTDiscus offers comprehensive and full-text access and coverage of sport, sports medicine, fitness, health, and related discipline. Subjects covered include athletic training, coaching, consumer health, exercise science, health education, kinesiology, nutrition, occupational health and safety, orthopedics, physical education, physical therapy, sociology of sports, sports psychology, sports injuries and rehabilitation, sports management, and sports sciences.
Indexes over 160 periodicals and provides comprehensive coverage of physical education, including kinesiology-biomechanics, physical fitness, physical therapy, sport psychology, sport medicine, health education.