Beginner's guide to bodybuilding.

Symmetric body as having a body like a V? I feel you already have a v-shaped body. :-)

Since your legs are already stronger and are defined, continue to do manual cardio - swimming, running outside, jogging, doing things, lifting with your legs and with your back properly arched. Some people tie a steel chain around their waist and tie the end of the steel chain with a rope wrapped around a tire, and drag that tire manually uphill with their body. I suppose legs get the most work out of them.