Performing a plank on an exercise ball is a challenging core workout for anyone. Holding this position on an unstable surface forces you to dynamically engage more abdominal muscles across the entire core from shoulders to toes. To maintain a solid posture, you will be constantly adjusting your stabilizers and will have much greater muscle activation throughout the abs.
“For me, getting a six-pack was about paying attention to what I was eating and lifting heavy weights at CrossFit. I do have a semi-strict diet, and I loosely count macros (focusing on daily carbs, protein, and fat intake rather than blindly counting calories) to stay balanced and on track. It sounds like a lot of work, but it really isn’t. Eventually, it just became a part of my lifestyle, and it’s something I enjoy doing. I even started a custom meal-plan business based on macros because I had such great results!” —Tina Haupert, @carrotsncake