urbazon/Getty Images Loaded marching, or rucking, is often used as a performance metric for members of the U.S. Army. It's required for graduation from Air Assault School, Mountain Warfare ...

If you're looking for a low-key way to boost your fitness in the New Year, then this army-inspired craze could be for you. Rucking, which involves walking around with a weighted backpack or vest ...

who began rucking when she joined the Army six years ago. Aritt typically carries 45 pounds when she rucks with the military, but in her personal workouts, she sticks to 15 to 25 pounds.