Authors Mark Cibrario My PTontheNET Content Mark is owner of The Trainers Club, a personal training studio in Northbrook, Illinois. He also serves as a Nike Training Athlete, consultant to Spri Products and lecturer for many fitness organizations. Mark is certified by National Strength and Conditioning Association (CSCS) and is a level 2 CHEK Practioner. Mark has co-produced 10 videos on strength training. He has authored books for Spri Products such as, "The Complete Guide to Rubberized Resistance Training" and "Pumping Rubber on The Ball." Mark has engineered a conditioning product called the TurboRamp, used by the Chicago Bulls and Milwaukee Bucks.