Study Up on These 12 Terms Every Runner Should Know

You will see the term hill repeats baked into many running plans, because running hills builds stamina and strength. Fighting gravity as you climb the incline requires a serious amount of energy, but think of it as strength training for your legs. If you can't find a hill, don't forget about the treadmill — you can always work the incline to challenge yourself, like with this 40-minute "hilly" treadmill workout.