When considering which body parts to work and when, it is important to realize that all should be focused on and given equal amounts of love. If focus is lacking on one, your body parts may start to grow out of proportion and others can become significantly weaker. A few benefits to workout out your upper body are muscle growth, increased energy, a stronger core, and more. If you feel you need more of a challenge, you can use the OrganicFit Upper Body Intermediate Guide.