High-Intensity Interval Training (HIIT) differs from traditional cardio in its structure and intensity. HIIT consists of short bursts of intense exercise followed by rest or low-intensity periods, effectively maximizing calorie burn and improving cardiovascular fitness in a shorter timeframe. This method enhances both aerobic and anaerobic fitness by pushing the body's limits. Traditional cardio, on the other hand, typically involves steady, moderate-intensity exercise over an extended period. HIIT's efficiency makes it a popular choice for those with limited time who want to achieve optimal fitness results.