You may not see this exact variation performed in the gym as often, but it can completely transform your back. Most people at the gym use a closer grip on cable rows, which primarily hits the midback.
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Cable crunches for a six-pack workout

Feel free to leave the training mat hanging and stay on the ground–or better yet, get on your knees. If you should focus on ...
A broad, well-defined back is a cornerstone of any well-rounded physique. But that’s not the only reason to pump up your posterior—it’s also a critical way of improving posture, reducing back pain, ...