"This exercise is so effective because it teaches you not to rely on your bigger muscle groups (like your thighs) and focuses on using your abdominals correctly in a controlled manner without using momentum. The use of the ball gives you natural feedback of your weaker side so that you can adjust and work on symmetry of your musculature, preventing future injuries."
To do it:Get into pushup position with both hands on the stability ball directly below your shoulders (your feet can be slightly wider than shoulder-width apart to give you extra stability). Contract your abdominals and try to bring your body into a straight line from your neck all the way to you toes (your butt should not be sticking out, so contract your glutes and keep your hips down). Once you are stable, lift your right leg a few inches off the ground and hold for 10 seconds. Repeat on the other side. Try to do three sets of a 10-second hold, and then advance to a 30-second hold.
5. Engage in resistance training aimed at your abs. In addition to eating right and losing weight, doing certain types of exercises can help you achieve a better-defined abdomen, Singer says. "I'm sure everybody knew somebody in high school who had tremendous abs who ate whatever he or she wanted and had tremendous abs without working out," Singer says. "Most of us aren't that lucky." If developing a six-pack is your goal, doing exercises aimed at your abs can be part of a successful regimen. Such workouts would include weighted crunches and weighted sit-ups, he says. Cardio workouts are helpful for shedding pounds, but won't, on their own, lead to defined abs.
Fats —Fats get a bad rep. Fats are actually required for the normal and healthy functioning of your body. They key is to consume healthy fats from sources such as almonds and walnuts without going overboard. If your fat levels are low, it’s going to affect the testosterone levels in your body, affecting your gains. Also, if you completely eliminate fats from your food, your body starts converting all your carbs into fat and we all know where that ends up!
Exercise also can't erase a couple factors beyond your control, experts say. "I think age plays a critical role in how easy or hard it is to get 'six-pack abs.' It's all about hormones – when we are younger, we have more circulating androgen hormones, which affords us the ability to not eat clean and yet continue to be shredded," Chait says. Our androgen hormone levels decline after we reach age 27, he says. (Testosterone is an androgen hormone in men. In women, a primary purpose of androgens is to be converted into female hormones known as estrogen.) After that age, "we need to focus more on dietary adjustments to maintain a lean body," Chait says.
“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