6 push-up tweaks to target different muscle groups (abs included, ofc)

In case you didn't know, you can totally mix up push up variations to burn more than just your core. Here's are six ways to do so.

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Photo: <a href="http://www.stocksy.com" target="_blank">Stocksy</a>/Marko Milovanovic

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.