No time to exercise? Then take five
You can do an all-around workout in just five minutes if you focus on intensity and target the main muscle groups.
Growing evidence continues to show that high-intensity interval training (HIIT) offers similar — or in some cases even superior — results compared with longer, lower-intensity workouts. With HIIT, you exercise for a short burst at near-maximum effort followed by a brief rest period, and then you continue to repeat the cycle over the next 10 to 15 minutes.
Small workouts, big gains
The main advantage to HIIT is that it takes less time than the traditional workout of 20 to 30 minutes or longer.