A portable electronic device comprising: a first sensor module; a second sensor module; at least one output device; and at least one processor configured to: detect an event relating to start of an exercise state, obtain motion information corresponding to the exercise state using the first sensor module, and obtain metabolite information of a user using the second sensor module, characterized in that the second sensor module includes a colorimetric sensor, including a photoplethysmogram, PPG, sensor, and a film disposed on the upper end of the PPG sensor, wherein the film disposed on an upper end of the PPG sensor is configured to sense light reflected from the user's body with a wavelength that corresponds to a lactate or a ketone body, and said processor is further configured to: provide first information regarding the exercise state to the user through the at least one output device, and provide second information regarding whether fat of the user is burned off based on the metabolite information, while the first information is provided, wherein the metabolite information includes a lactate value or a ketone body value. a first sensor module; a second sensor module; at least one output device; and at least one processor configured to: detect an event relating to start of an exercise state, obtain motion information corresponding to the exercise state using the first sensor module, and obtain metabolite information of a user using the second sensor module, characterized in that the second sensor module includes a colorimetric sensor, including a photoplethysmogram, PPG, sensor, and a film disposed on the upper end of the PPG sensor, wherein the film disposed on an upper end of the PPG sensor is configured to sense light reflected from the user's body with a wavelength that corresponds to a lactate or a ketone body, and said processor is further configured to: provide first information regarding the exercise state to the user through the at least one output device, and provide second information regarding whether fat of the user is burned off based on the metabolite information, while the first information is provided, wherein the metabolite information includes a lactate value or a ketone body value. detect an event relating to start of an exercise state, obtain motion information corresponding to the exercise state using the first sensor module, and obtain metabolite information of a user using the second sensor module, characterized in that the second sensor module includes a colorimetric sensor, including a photoplethysmogram, PPG, sensor, and a film disposed on the upper end of the PPG sensor, wherein the film disposed on an upper end of the PPG sensor is configured to sense light reflected from the user's body with a wavelength that corresponds to a lactate or a ketone body, and said processor is further configured to: provide first information regarding the exercise state to the user through the at least one output device, and provide second information regarding whether fat of the user is burned off based on the metabolite information, while the first information is provided, wherein the metabolite information includes a lactate value or a ketone body value. provide first information regarding the exercise state to the user through the at least one output device, and provide second information regarding whether fat of the user is burned off based on the metabolite information, while the first information is provided, wherein the metabolite information includes a lactate value or a ketone body value.