work up a sweat

:  activity in which one exerts strength or faculties to do or perform something:

:  sustained physical or mental effort to overcome obstacles and achieve an objective or result

:  activity that a person engages in regularly to earn a livelihood

:  used for work

:  suitable or styled for wear while working

:  involving or engaged in work

:  to bring to pass :  effect

:  to fashion or create a useful or desired product by expending labor or exertion on :  forge, shape

:  to make or decorate with needlework

:  in or into a higher position or level

:  away from the center of the earth

:  from beneath the ground or water to the surface

:  risen above the horizon

:  standing

:  being out of bed

: used as a function word to indicate motion to or toward or situation at a higher point of

:  up into or in the

:  in a direction regarded as being toward or near the upper end or part of

:  one in a high or advantageous position

:  an upward slope

:  a period or state of prosperity or success

:  to rise from a lying or sitting position

:  to move upward :  ascend

: used with and and another verb to indicate that the action of the following verb was either surprisingly or abruptly initiated

:  to excrete moisture in visible quantities through the openings of the sweat glands :  perspire

:  to labor or exert oneself so as to cause perspiration

:  to emit or exude moisture

:  hard work :  drudgery

:  the fluid excreted from the sweat glands of the skin :  perspiration

:  moisture issuing from or gathering in drops on a surface