Sweat Sweat , or perspiration , was a liquid secretion produced by an individual ' s body for the purpose of expelling toxins and cooling one ' s body temperature . Sweat was a byproduct of vigorous exercise or exertion and could also be produced due to prolonged exposure to heat from an external source or as a response to strong emotion s , such as fear . While forced to stay in ' s catwalk in 2152 , Commander and Ensign Travis Mayweather started to sweat due to the increasing temperature in the command area . ( ) In 2153 , Trip Tucker woke up sweating after a nightmare about the death of his sister . ( ) " In 2259 of the alternate reality , became sweaty after melding with Spock . " ( ) In 2266 , Doctor Leonard McCoy encouraged a reclining James T . Kirk to keep pedaling until he worked up a little sweat , saying it would do him good . ( ) The manic evil half of Kirk sweat profusely while roaming the hall s of the . ( ) When fighting with an ill Joe Tormolen , Kevin Riley accused him of getting in a sweat ( all worked up ) . ( ) Concerned that Worf was taking an upcoming game of Parrises squares too seriously , Riker told him it was just a game , saying , " " You work up a sweat , you have a few laughs , and you make new friends . " " ( ) While working at the New Zealand Penal Settlement in 2371 , Tom Paris was sweating . ( ) An upset Jadzia Dax suggested that a cold - foot ed Worf go back to sweating and bleeding in the holosuite with his friends and when he was finished , Benjamin Sisko could perform their wedding ceremony in his office . ( ) In 2373 , Pascal Fullerton described himself as " " a middle - aged ponderous academic , sweating under the hot Risian sun s . " " ( ) There were some individuals who might be capable of not breaking a sweat even while accomplishing a physically demanding task . For example , Julian Bashir played a Vulcan in the racquetball finals at Starfleet Medical Academy in his senior year . He later remarked on the Vulcan ' s stamina , saying he didn ' t think the man had even broken a sweat . ( ) Similarly , Odo ' s assessment of Kurn ' s prowess as a Klingon warrior was that he could have disarmed a Boslic captain without breaking a sweat . ( ) Sweating as a medical symptom . Sweating could also be a symptom of illness . " Sudden , profuse sweating , also known as " flop sweat " , was a side effect of the Melvaran mud flea vaccine . " ( ) Increased perspiration rate among male s present in the briefing room was one of the symptoms reported by the ' s computer when Kirk asked for sensor probe readings . This indicated , much to the embarrassment of Kirk and other men present at the time , that they were physically attracted to Mudd ' s women . ( ) While under the influence of polywater intoxication , Hikaru Sulu remarked that he was " sweating like a bridegroom , " though he wasn ' t sure whether it was caused by Psi 2000 or Tormolen ' s death . After Riley became ill with the polywater intoxication , he commented that he was sweating , too . Later , McCoy discovered that perspiration was the vector responsible for transmitting the illness . ( ) In 2268 , Dr . McCoy asked Montgomery Scott if he was experiencing sweating due to a gas grenade he had been exposed to . ( ) As a result of the infection with the phage , B ' Elanna Torres started to sweat and was in pain . ( ) Appendices . Background information . As established in a deleted scene from , some trace of perspiration remains on anything anyone touches , and Human perspiration was mainly composed of sodium and calcium salt s , whereas Vulcan sweat primarily consisted of copper salts . Vulcan perspiration was detected by Leonard McCoy and Montgomery Scott when they used a spectrograph beam to analyze computer tape s which Spock had touched while sabotaging the ship in order to lock it on a course to Talos IV .