Circuits, bootcamp, HIIT (high intensity interval training), Tabata and so on.. Are all names for a similar type of workout, timed exercises. However, each does something a little different. Most commonly HIIT and Tabata get mixed up, so this feature explains the difference.
So maybe now would be a good time to try a Tabata workout? It can be done in 4 minutes (plus warm up and stretches).