I've slowly come to love running uphill. At first my booty and hamstrings would burn unbearably, and I'd have trouble breathing. It takes a while to train your body to conquer hills, and one trick I practice is to be mindful of my posture. Give this a try the next time you're faced with a hill. Instead of leaning your chest forward to trek uphill, run with your hips pressing forward so that your shoulders are stacked on top of your pelvis. Not only will it allow you to use the power of your quads and glutes to get up the hill, but it'll take pressure off your knees and lower back.