“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: Stand with your feet hip-width apart, shoulders down, and your abs drawn in. Hinge forward at your waist and inch forward, walking with your hands into a top-of-the-pushup (or plank) position. Hold plank for three seconds, being sure to keep your chest lifted and your belly button drawn into your spine. Your body should form a straight line from your ears to your ankles. Then, perform one pushup by bending your elbows to the sides and lowering your body towards (but not touching) the floor, maintaining a straight spine.
Lie on your back, arms behind your head, like you’re in a crunch position, with legs raised and bent at a 90-degree angle. Kick your legs back and forth like you’re riding a bike. While you do that, alternatively twist the upper part of your torso in tandem with your legs. For maximum toning, do this for as long as you can take it. Once you master this move, you’ll never forget it—it’s just like riding a bike!
The inspiration for this exercise might come from skiing, but it's also an effective way to prepare your midsection for many sports, including tennis, softball, and golf. The reason: "It trains your abs, lower back, and hips to work together to rotate your body from side to side," says Durkin. And the more powerfully you can rotate, the faster you can swing and the harder you can throw.
Follow a program. Alcantara is all about consistency — one reason why she recommends choosing a structured fitness plan rather than shooting in the dark and praying you surface with abs. "Follow it to 100 percent, do it back-to-back," she says. Many fitfluencers offer their own programs, but you'll want one from a certified fitness trainer like Alcantara, who offers an eight-week guide.
Your core muscles allow you to stabilize your spine when you do pushups, shovel snow, walk up stairs, pick up your kids from the floor, and otherwise go about the motions of everyday life. "That's why the best ab exercises don't flex your spine, they keep your spine straight," says Durkin. The hip-up does exactly that while also sculpting your obliques and increasing your rotational control and stability.
Lie faceup with feet flexed in the air so body creates a 90-degree angle and arms are rested palms down at sides. Use core to pulse legs straight up towards ceiling, lifting butt off floor and pushing weight into hands. Think about stamping the bottom of your shoes on the ceiling and avoid using momentum to swing legs forward and up. Lower back to floor and repeat.
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Breakfast (9.30AM) — If you workout in the evening, nothing (IF). If you workout in the morning and it’s your cardio day, still nothing. On weight training days, 1 serving of Steel Cut Oats (why they’re better than regular oats) and skimmed milk, topped with some nuts and cinnamon powder. It’s imperative you replenish your muscle glycogen with some carbs post workout. I would usually cook 5–6 servings of oats on the weekend and store them in the refrigerator, using them through the week.
When guys talk about six-packs, they are really talking about one muscle, called the rectus abdominis. “The rectus abdominis runs from our lower ribs down to the top of our pubic bone, and fibrous bands of tissue break up the muscle along the way to give us the six-pack look we all desire,” explains kinesiologist David Cary, C.P.T., a T4 Coach at Equinox in Chicago. So, if you want to sprout six-pack abs, this is the muscle you need to work.