High Intensity Interval Training (HIIT) is an effective workout method that alternates between short bursts of intense activity and periods of rest or low-intensity exercise. For instance, after running vigorously for one minute, taking a rest or walking slowly for the same duration helps to recover while maintaining the workout's intensity. This approach not only boosts cardiovascular fitness but also maximizes calorie burn in a shorter amount of time. Typically, a HIIT session lasts up to 30 minutes, making it a convenient option for those with busy schedules who still want to get a challenging workout in.