This is why trainers want you to ‘burn out’ your muscle groups

You may have been told to "burn out" your abs, quads, or arms mid-workout. That's because doing so improves endurance and helps to tone and build muscle.

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Photo: Getty Images/Eva Katalin

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.