A wearable device includes at least one memory, at least one sensor, a display, and at least one processor configured to receive, via the display, an input with respect to an item among a plurality of items respectively representing an exercise plan; in response to receiving the input, acquire, via the sensor, information for a first body temperature of a user wearing the wearable device; in response to identifying that the first body temperature is less than a first reference temperature, display a second screen guiding a warm-up exercise distinguishable from a first screen guiding the exercise plan indicated by the item corresponding to the input; acquire, via the sensor, a second body temperature of the user, while the second screen is displayed; and in response to identifying that the second body temperature reaches a second reference temperature, switch the second screen to the first screen.