J.Lo’s trainer spills the secret behind her strong core: a 4-part plank move

Want a core like J.Lo? Try the super-strengthening, four-move plank series from the Jennifer Lopez workout routine. Learn how from her trainer, David Kirsch.

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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.