Healthy Food Chart

My husband and I recently started Cool Running's 9-week conditioning app, Couch-To-5K.  Three days a week, we jog around our neighborhood.  Despite my grumpy morning mood, I've noticed something: We never miss a workout.

Past research -- like a 2009 Penn Medicine study -- has shown that having partners in exercise can increase weight loss.  And, more recently, a May 2011 Michigan State University study found that even virtual workout buddies with superior ability increased motivation -- the relevant subjects held postures for 24% longer!