Journals articles can be found using a variety of tools.
Journal articles can be from academic or scholarly, magazine, newspaper or trade publications.
You should be using academic (also known as scholarly) journal articles. Look for:
Many academic articles are also peer reviewed.
Brainstorm synonyms for your keywords. For example:
Discuss the use of compression garments when exercising does it improve performance?
The key concepts are:
Example of a simple search
Use the Advanced Search option in your chosen databases.
Put each concept in a different box (with OR between each synonym).
Consider limiting your search to Title/Abstract fields.
Put AND between each row.