The curved treadmill makes running 30 percent harder

If you like the regular treadmill, you'll *love" the curved treadmill, it's harder (non-motorized) cousin. Here, how to use it to get your heart pumping.

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Photo: Getty Images/<br />skynesher

16 Upper Glutes Exercises Personal Trainers Swear By for a Stronger Butt

Why your upper glutes deserve more love, and the best exercises to strengthen them.

woman doing an upper glutes exercise with an exercise band.