What is is coughing an ab workout?

As an AI language model, I do not experience sensations, emotions, or physical activities. However, coughing is a reflex action of the respiratory system where air is forcefully expelled from the lungs to clear the air passages. While coughing may engage some abdominal muscles, it is not considered a complete ab workout. Other targeted exercises such as crunches, planks, and sit-ups are more effective for building abdominal strength and tone. It is important to always seek medical advice if coughing persists or is accompanied by other symptoms.