This is the hardest oblique ab move you’ll ever do, according to a fitness trainer

Master the "Twisted Army Crawl," which a fitness trainer says is the best oblique exercise out there. And also the hardest.

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Photo: Getty Images/Vladimir Sukhachev

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.