6 Reasons Every Woman Should Start Boxing Right Now

One of the most HIIT workouts, most boxing rounds alternate between periods of maximum effort and active recovery.

"It is both an aerobic and an anaerobic workout," says Karina.

That means as the workout intensity increases, your body requires more energy than aerobic metabolism can provide, and suddenly you're also in an anaerobic training zone — the type of exercise that builds strength, speed, and power, and boosts your metabolism. So, compared to running at a steady pace, boxing burns more calories in less time.