Fitness Fact: Get outdoors and burn some serious calories while you increase your muscle definition! Hike at your nearest park or trail reserve and take your backpack with you. If you carry 10 to 20lbs the average person will increase their calories burned by up to 28%. The extra load pushes your body to work harder and burn more. If you plan to carry more than 10lbs make sure the backpack your using has chest and waist straps to evenly distribute the weight across your shoulders, back and hips rather than your lower back taking the brunt of the impact with every step.