Koko. A Digital Gym in Herndon is personal training – rebooted. Koko’s technology will help you get fit & lose weight faster than a personal trainer. It starts with our Koko FitCheck system that diagnoses your lean muscle level each time you come in. Using your FitCheck results, we create a custom Koko exercise program for strength and cardio, and a nutrition plan to fuel your body for the fastest results. The Koko Smartraining system includes customized exercise and nutrition and means being fit doesn’t have to be that hard anymore.