If you want to improve your endurance on and off the hiking trail, walking with a heavy backpack (aka "rucking") is a great, low-impact way to do that. Follow these 3 Rules of Rucking: 1.) Wear a backpack that's 5-10 lbs heavier than your "usual" hiking backpack weight...this way it feels light when you get on trail 2.) Walk as fast as you can with intention....this will get your heart rate up and over time you'll improve your ability to "kick it up a notch" when you're hiking if you need to get