This woman set a world record with a 4-hour plank—here’s her secret

Wondering how to do a plank like a professional? Here's how the woman with the world-record plank hold went from four minutes to four hours.

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Photo: <a href="http://www.stocksy.com" target="_blank" rel="noopener noreferrer">Stocksy</a>/Jacob Lund

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.