To keep things exciting on a treadmill, you have to mix it up, and one way to do so is to play with the incline. For folks with troublesome ankles and knees, going faster can make cranky joints even crankier. By adjusting the grade you can increase the difficulty of your workout without compromising the joints of your lower legs. If you walk on a treadmill, use that incline button to take yourself for a hilly hike with this walking workout . On last week’s episode of The Biggest

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Treadmill Tip: Adjust the Grade