Gym language
Private session
Also called a private, or a one-on-one
What it means
A paid session with a trainer to yourself, outside the group timetable. Usually an hour, usually booked directly with the trainer, and usually the fastest way to fix something specific.
They are most useful when you have a named problem: a kick that keeps landing wrong, a guard that drops, a fight coming up. They are least useful as a general upgrade to a session you are already getting.
Money for privates usually goes to the trainer rather than to the camp, which is part of why they get offered.