In an average day, people spend more time sitting at their computer, t.v., and in their car. For this reason, its not uncommon to see someone with that "slouched" posture. You know it, head forward, shoulders pulled forward, big rounding of the upper back.
How do we fight this? By training the upper back with weights! Strength training 2-3 times per week can drastically improve posture. Perform two of these movements at least twice per week.
Pull Ups or Assisted Pull Ups
Goodluck with your training and keep fighting the war against bad posture!!!