Studies prove that having a workout buddy is the most effective way to reach your fitness goal(s). A workout buddy is (and should be) there to support and motivate you. You can feed off of each other's energy and there is an extra pair of eyes to see if you are doing the work outs correctly.
This is an excellent article from Gina Demillo Wagner at www.experiencelife.com titled :
We're encouraging our Rainbeau Curvy girls to grab her best friend and have fun getting active! A work out 'buddy' is cool but working out with your best friend means you are only building your relationship stronger. Yes, I'm sure you both enjoy meeting for brunch or shopping but how often are you and your best friend put to a challenge together? Get to know your best friend more, sweat more, gossip more and enjoy working out more!