How to: Lie on your left side with your legs straight and your right leg stacked on your left. Position yourself so your weight is resting on your left forearm and the outside edge of your left foot. Your elbow should be directly beneath your shoulder, and your upper arm should be perpendicular to the floor. Align your body so it forms a straight line from your neck to your ankles, and place your right hand on your hip. Lower your hips toward the ground a couple inches, then come back up to start. That’s one rep. Do 15 reps on each side.
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.
For example, believing that you should eat your pre-workout meal is a great way to procrastinate with your training. What if you worked overtime and you don’t have enough time to eat your pre-workout meal? What if you don’t have enough money to buy supplements? All the items in the above list have the potential to evolve into excuses for procrastinating, or worse, quitting. Just forget about them and only do what matters. This will save you enormous time and willpower that should be spared for the things that actually matter in your quest to get abs.
"Most guys neglect their obliques in favor of their six-pack muscles, and that's a mistake," says Jack. "Your obliques not only support your spine, but they also help your abs work together with the muscles of your hips and lower back to explosively rotate your torso." That means you'll be able to lift heavier loads on every exercise, while adding a ton of rotational power to your tee shot and Hail Mary pass at the same time.

To do it: Stand with your feet planted 3-4 feet apart, toes slightly turned out, hands on your hips. Lower into a plie by bending your knees out over your toes and lowering your hips directly underneath your shoulders. Then, as your straighten back up, slowly lift the right knee up towards the right shoulder. As you go back into the plie, slowly return the foot to the floor. Be sure to move at a very controlled pace to really engage the obliques the entire time—on the way up and on the way down. Do 10 repetitions on the right side, then another 10 repetitions on the left side for a total of 20.

best ways to build core