Back is about 35-40% of our body and its the only muscles we are using even when we are standing or sitting or even sleeping. Back involves a huge amount of over all core strength. It gives Manly definition and physique definition.
Back not only helps a good posture but also a good upper body shape.
Wider back increases also abdominal area strength. It also helps in getting rid of any back pain and get a better stamina.
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