It's important to get the most out of your workout — that includes being safe, ensuring good form, fueling up properly, and not wasting any time! Whether you're brand new to circuit training or a seasoned vet, you might be making one or all of these mistakes . . . rookie mistakes that Barry's Bootcamp trainer Erica Stenz says she sees every day in her classes. Use this list of trainer secrets as your checklist of what NOT to do in your next training session at Barry's, in a HIIT class, or at your gym.