The two major movements with weights our arms perform to a large extent involve 'pushing' and 'pulling'. Because a majority of the pushing exercises are done in front of the body, it developes the chest, shoulders as well as the muscles behind the back of the arms, or the triceps. An example of the pushing movement is the flat bench press.
On the other hand, the pulling movement engages the back of the body, including all of the muscles in the back as well as the front of the arms, including the forearms and biceps. Despite being ignored by many because you aren't able to see the back muscles most of the time, they are crucial to the overall health of the body, including the posture you attain or assume throughout a given day. From a cosmetic standpoint, a shapely back allows clothes to fit even better.
The bent-over row is one of the best exercises to give your back the aesthetic shape of a V. Back muscles can be difficult to train as it requires the perfect form and technique, but when done in isolation, they return positive results. The muscles in the back, in fact, allow your arms to function properly, using the muscles in the wings on either side of the spine to extend, stretch, lift or pull with efficiency.
Named after the movement one performs while rowing a boat, the bent-over version requires the body to remain still while the back and arms do the work. It is also said that the amount of pulling exercises must match the amount of pushing exercises you are doing overall, as it helps maintain balance between the front and back of the body.