The ‘breathing plank’ is the hardest variation you haven’t tried yet

The breathing plank is the hardest plank variation you haven’t tried yet. Here's how it fires up your muscles even more, and exactly how to do it at home.

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Photo: Getty Images/Maskot

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.