J.Lo’s trainer shares 3 core-blasting moves you can do with a medicine ball

Want a super-strong core? J.Lo's trainer David Kirsch just shared the best medicine ball exercises for abs, and here are 3 moves to start with.

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Photo: Getty Images/James Devaney

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.