Did You Know That Cardio Uses 3 Different Energy Systems? Here’s How To Shape Your Workout To Maximize the Benefits of Each

Understanding the three cardiovascular energy systems, and how to leverage them when working out, will help maximize your cardio days.

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Photo: Getty Images / Skynesher

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.