A holodeck exercise programme used by Worf aboard the Enterprise-D, in which he fights a succession of monstrous armed opponents in a misty alien landscape.
Worf's calisthenics programme is his preferred form of exercise, a series of hand-to-hand fights against skull-faced and reptilian warriors at increasing levels of difficulty.
It is first seen in the Next Generation episode Where Silence Has Lease, when Riker joins him for a session and finds Worf so caught up in the fighting that he briefly turns on his commander. In The Emissary, K'Ehleyr works off her temper in the programme at a high setting; Worf joins her, and the combat ends in their reunion.
In New Ground, Worf's son Alexander runs it alone at the novice level. Similar Klingon exercise programmes are run by Worf and Jadzia Dax in the holosuites of Deep Space 9.