Are you asking what that term means? It means exercise in a gym. If not, I don't understand your comment.
It was confusion about whether "workout" is the same as "work out"
Typically "workout" is a noun and "work out" is a verb, but people often use the two spellings interchangeably. In this case the poster was using "workout" as a verb, in which case yes it does mean the same thing as "work out".