Do it: Stand with your feet hip-width apart and hold a dumbbell in your right hand, palm facing inwards towards the torso. Keep your back straight, activate your core, and then bend to the side as far as possible—but only at the waist. Hold for one second at the bottom of your range of motion, and return to start for one rep. Do between 12 and 20 reps for one set.
Contrary to what popular culture portrays, one does not need to lift really heavy if muscle hypertrophy, aka “bigger muscles” or aesthetic gains are the primary goal (see bodybuilding vs powerlifting). One needs to ensure that a particular muscle is subjected to enough time under tension and training volume to ensure that muscle fibres are broken down and rebuilt stronger over time. This can be done by following a high-volume, moderately high rep range, moderate weight and low rest period lifting routine. I start off with 5 sets of a heavier compound lift eventually moving to isolation exercises. I started off with the popular ‘3 sets of 10’ for isolation exercises, then to 12 and now hit 4 sets with the rep ranges 15,12,10 and 8. Higher reps would mean a lighter weight and vice versa. My last set is almost invariably a dropset. I hit around 15 -18 working sets per muscle group per week.
In your workout: Regularly implement both back and front squats into your program. To keep it from becoming mundane, you can rotate through them in four-week waves, or alternate weeks between back and fronts. It's best to do your focused ab training on a day after your heavy training days for the week. The last thing you want is residual soreness that forces you to decrease the weight on the bar.
The first step to finding your six pack is to clean up your diet. If you want to see your ab muscles, you need to decrease your overall body fat. Get rid of processed "junk" foods, sugars and processed carbs. Eat more vegetables, nuts, and fruits, organic lean protein and healthy fats, such as olive oil, fish oils, and avocados. Try eating several small meals each day and avoid late night snacking. Eat some protein for breakfast, lots of vegetables, fruits, and fiber and drink water rather than calorie-laden beverages. Don't cut calories drastically or you could inadvertently lower your metabolism. Bottom line: eat more high quality, nutrient-rich foods and eat fewer empty, processed calories.
“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