Getting a six-pack of abs is a combination of proper diet and core-strengthening exercise. Get six-pack abs withtips from a nationally-certified personal trainer in this free video on exercise and fitness. Expert: Jani Roberts Contact: www.janiwestroberts.com Bio: Jani Roberts is a graduate of the American Academy of Nutrition and owner of The Wellness Company of Dunedin. Roberts is a nationally certified personal trainer and group fitness instructor. Filmmaker: Christopher Rokosz … exercises …