This 15-Minute Low-impact HIIT Workout Works Your Muscles Without Sacrificing Your Joints

High-intensity interval training doesn't have to be hard on your joints, and this low-impact HIIT workout proves that in just 15 minutes.

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Photo: Getty Images/Mireya Acierto

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.