Gymnasium A gymnasium was an area of a starship which was dedicated to physical fitness and exercise . The gymnasium on board an starship was located on C Deck . It usually featured a number of items that could be used for the fitness of the crew , including exercise bike s , treadmill s , and weights . ( ) In 2152 , Captain Jonathan Archer and Sub - Commander T ' Pol ran on treadmill s in the gym aboard the NX - class starship . ( ) Later that year , T ' Pol taught four colonist s from a mining colony a Vulcan martial art , the " Suus Mahna " , in the ship ' s gym . ( ) Hoshi Sato mentioned that she should spend more time in the gym when she returned from an away mission to an alien planet . ( ) In an hallucination experienced by Ensign Hoshi Sato in 2152 , she imagined " Enterprise " s gym at one point being used for workouts by herself and Commander Charles Tucker III ; he used the gyrosphere whereas she used a weight machine . Sato erroneously believed she was in the gym when , following Tucker ' s departure , she became invisible ; the weights in the room were unresponsive to her touch , her right hand even passed through both the free - weights and the control panel for the door out of the gym , and she ultimately watched her reflection in the large mirror fade completely out of sight . She , unable to leave , seemingly remained in the gym overnight and saw T ' Pol and Tucker carry out a quick inspection of the area hours later , investigating her disappearance , before she hurriedly followed them out of the room . ( ) Later in 2152 , Lieutenant Malcolm Reed was cycling on an exercise bike in the gym when Commander Tucker entered the room . He went on an adjacent exercise bike and , as the two men cycled , they discussed Denobulan s Phlox and Feezal . ( ) In December 2153 , " Enterprise " s gym was used by several members of " Enterprise " s senior staff and numerous MACO s for multiple training sessions supervised by MACO General J . Hayes . ( ) In 2154 , the senior staff of " Enterprise " ( with the exclusion of Commander T ' Pol ) played a game of basketball in the ship ' s gymnasium . ( ) Later the same year , Ensign Travis Mayweather , Lieutenant Malcolm Reed and two other officer s used " Enterprise " s gymnasium to train , in an attempt to keep their minds off of three Orion slave girl s who were guests aboard " Enterprise " . ( ) In 2266 , Charles Evans visited the gymnasium of the starship . While there , he exhibited extremely powerful abilities when he made a laughing disappear . ( ) The gymnasium on board the starship was located on Deck 12 . In addition to gymnastics studios and martial arts areas , ( ) there was also a parrises squares area , ( ) a zero gravity area , ( ) and an anbo - jytsu court . ( ) The starship ' s gymnasium also featured a fencing room , where Captain Jean - Luc Picard often fenced with members of his crew . ( ) In early 2371 , Lieutenant Walter Baxter reported to sickbay aboard the after injuring himself while exercising in that starship ' s gymnasium . ( ) Later that year , Baxter was exercising in the gymnasium again when he realized that the environmental control s were malfunctioning and the temperature had dropped to below 10 °C . This was discovered to have happened as a result of " Voyager " s encounter with a spatial distortion . ( )