Personal training is an unregulated industry. That said, there are still good reasons for having personal trainer certifications. But if you're collecting them just to put them up on your wall and impress your clients, you may be wasting your time! Here are the most popular, most effective, and most useful personal trainer certifications, all gathered here in one spot for you by thePTDC, the Personal Trainer Development Center! Read the full article "Top Personal Training Certifications: United States" - http://www.theptdc.com/2011/11/top-personal-training-certifications-united-states/