David R GroscupDavid Groscup is the author of 13 best-selling bodybuilding and fitness training manuals and has been training for over 40 years. He is certified by the IART/Med-Ex as a HIT, high-intensity trainer and has personally trained many successful clients uing his methods of bodybuilding and fitness. An advocate of constantly increasing one's knowledge in the field of exercise science and health, he has obtained additional certifications as a kettlebell instructor, nutritional therapist, and sports nutritionist. He has a blog on High-Intensity Training at https: //drhitshighintensitybodybuilding.blogspot.com/ Read More Read Less