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Sculpt Bikini-Ready Abs Under Your Sweater

Strengthen and Slim Your Stomach

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Are you ready to shed your heavy sweaters and snow boots in exchange for tank tops and sandals? You're not alone! While bone-chilling temperatures may not be entirely behind you, spring will be here before you know it—and bikini season soon after that. No need to panic! If you start shedding your winter layers now, you'll be looking and feeling great with plenty of time to spare.

This abs workout is the perfect way to give your core a serious wake-up call and bring your flat, sexy stomach out of hibernation. By starting with a standard plank and then moving into plank variations, you'll tighten up your deepest abdominal muscles, as well as your glutes and legs, in record time.

Workout details: Three or four times a week, perform 3 sets of each exercise in the circuit.

VIDEO: Workout Secrets From Sports Illustrated Swimsuit Model Julie Henderson


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30-60 seconds

Start to get into a pushup position, but bend your elbows and rest your weight on your forearms instead of your hands. Your body should form a straight line from your shoulders to your ankles. Brace your core as if you were about to be punched in the gut. Hold this position for 30 to 60 seconds while breathing deeply.

Plank with Leg Raise

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10 reps per side

Get into plank position on your forearms with your abs in tight. Engage your glutes to lift and hold one foot a few inches off the floor, foot flexed. Do 10 lifts on one side, and then switch legs.

Side Plank

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30 seconds per side

Lie on your right side with your knees straight. Prop your body up on your right elbow and forearm, feet stacked. Raise your hips until your body forms a straight line from your ankles to your shoulders. Hold this position for 30 seconds per side (or longer if you can), bracing your abs and breathing deeply for the duration of the exercise.

Side Plank with Leg Lift

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30 seconds per side

Start in side plank position with your right elbow below your shoulder, feet stacked. Keep your core braced as you lift your left (top) leg as high as you can while maintaining proper form. Flex your foot and point your toes slightly down. Press your hips up and keep your glutes engaged the entire time. Hold for 30 seconds each side.

Straight-Arm Plank

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30 seconds

Come into top-of-a-pushup position with your hands on the floor beneath your shoulders, arms straight. Set your feet close together and straighten your legs, with your weight on your toes. Your body should form a straight line from your ankles to your head. Brace your abs and squeeze your glutes to help keep your body rigid. Hold for 30 seconds.

Straight-Arm Plank on Medicine Ball

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30 seconds

Place both hands on the sides of a medicine ball and get into full plank position on the balls of your feet, legs engaged. Spread fingers wide and press hands firmly into the ball. Draw shoulder blades down and back. Hold for 30 seconds.

Downward Dog Splits

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30 seconds per side

Begin in downward facing dog. Extend your left leg up to the ceiling, pointing your toes. Keep your legs and core engaged the entire time. Hold for 30 seconds and then come back to center and switch sides.