I am assuming you want the bar code to be stored in a column of your database?
A barcode scanned is just an input device on your computer much like a keyboard.
You could use DataAssist to create the pages for managing you fitness center database tables, when the record is being created, make sure the cursor is in the barcode form field before scanning the barcode, when you scan it, the barcode text will be inserted in the form as if you typed it.