Stability moves like the plank are a great way to strengthen a weak core and prevent lower back pain. But if you want to kick things up a notch, then start dancing. When you perform the breakdancer, you'll quickly move your feet from side to side and across your body. However, you must maintain the same rigid, straight torso that you would when performing a plank.
Start in a side plank with left forearm on floor, elbow under shoulder, feet stacked, and hips lifted so body forms one long, straight line. Stretch right arm up to ceiling. This is your starting position. Draw the right hand down and reach it below left underarm as you curl upper body forward so shoulders are parallel to floor. Return to starting position. Repeat for 30 seconds on each side.
Kneel on a mat on all fours with your hands directly under your shoulders. Stretch your legs back one at a time to come into plank position (the “up” part of a push-up); engage your ab muscles. Your body should be long and straight; don’t let your hips sag or lift your butt too high. Imagine there’s a seat belt tightening around your waist, drawing your lower-ab muscles inward.
“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