Do you have a gut or a tight, lean midsection? As a master Pilates instructor for 10 years, I can comfortably say that I know what’s best when it comes to your core. Strength, stamina, and posture are the keys to solid abs. Below, you’ll find five quick and easy Pilates exercises you can do anywhere—even in front of the TV while you watch ESPN highlights. Each exercise will hit the major core muscles: transverse abdominis, internal and external obliques, serratus anterior, latissimus dorsi, spinal erectors, and, of course, the rectus abdominis.