David Tudor is the owner of DAT Fitness. He offers high intensity interval training (HIIT) classes and one-on-one personal training. David is an Ellinwood native. He is a Certified ISSA Personal Trainer, Highland Game Athlete, State Champion Powerlifter, and is certified in CPR/First Aid. High-intensity interval training (HIIT) is a one-hour cardiovascular exercise session alternating short periods of intense anaerobic exercise with less intense recovery periods. You?ll perform short bursts of high-intensity exercise followed by a brief low-intensity activity, repeatedly to build muscle and lose fat. Great for trimming down and toning up!