“The bird dog forces you to keep your core stiff,” says Jack. “Lifting your knees off the ground just a couple of inches—as you do in this exercise—makes it even more challenging to keep your torso still as you switch arms and legs.” That means your hips and lower-back muscles, obliques, rectus abdominis (also known as the six-pack muscles) are working together to keep your spine stable.
To do it: Lie on the floor with your arms extended above your head and both legs lifted in the air at about a 45-degree angle. Inhale, roll your head and shoulders off the mat, press your ribs down toward your hip bones and exhale, lifting your entire upper body off the mat (keeping both legs up). At the top of the exercise, "land" your arms so that the arms and legs are parallel to one another. Then, breathe "naturally" while holding the top/up position for two slow counts.  Reverse the action by inhaling and then rolling your back, shoulders and head down onto the mat exhaling at the start position.
To do it: Lie down with a small ball (a small pillow will also work if you don’t have a ball) under your heels, both arms extended over your head, palms facing towards each other. Inhale to prepare as you lift your head, neck, and shoulders off the floor and then exhale as you continue to roll up by drawing in your abdominals, reaching up and over towards the feet. Keep your abdominals contracted, with your spine rounded in a ‘C’ curve, and then inhale to prepare and exhale as you roll down through each vertebra in a controlled movement, keeping your heels pressed evenly into the ball the entire way up and down. Do 15 reps as controlled and precise as you can.

As the kettlebell shifts from hand to hand in front of your body, your core has to stabilize to fight against the movement of your arms, and your biceps, shoulders, and back muscles need to work together to control the pace at which you are catching and releasing the kettlebell. Your lower-body will get a workout, too. You can perform this abs exercise with a bent waist to hammer your hamstrings and glutes or try it in a squat position to target your quadriceps. No matter which way you try it, you'll see bigger strength gains and a smaller waistline in less 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

×