In this week's exercise video, Dr. Adam Meisenhelder, chiropractor at Back In Motion Chiropractic & Sports Rehab in Beaverton, Oregon, demonstrates several variations of the side plank. The side plank is a fundamental core exercise, and is a great compliment to the front plank, featured in a previous blog post. The side plank targets the transversus abdominus, glute medius, glute minimus, adductor, and internal and external obliques (highlighted in red in the picture below).