Slimming down your core is among the most challenging fitness goals.

Your workouts should include medium to high-repetition core work that will helpbuild up your core musclesfor more definition.

This requires the right workout and a healthy diet that keeps you in a sustainable, moderate caloric deficit.

woman doing russian twists with medicine ball, concept of exercises for a slimmer core in 30 days

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The following exercises are our favorite go-to exercises for a slimmer core in 30 days or less.

Consider adding a few days of cardio for some extra calorie burn.

Planks

The plank is a fundamental exercise forcore strength.

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Additionally, it improves posture and enhances overall stability.

Engage your core and straighten your body, supporting yourself on your toes and forearms.

Maintain a straight line from your head to your heels, avoiding any sagging or arching of your back.

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Hold the plank position for the target time, keeping your core muscles tight and your breathing steady.

Repeat for three sets of 30 to 60 seconds each.

Lean slightly back while keeping your back straight at a 45-degree angle to the floor.

woman doing bicycle crunches, concept of strength exercises for women to melt muffin top belly

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Clasp your hands together in front of your chest, engaging your core.

(you’re free to also hold a medicine ball.)

Twist your torso to the right, bringing your clasped hands toward the right side of your body.

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Return to the center, and then twist to the left side.

Keep your feet on the ground and your core tight throughout the exercise.

Repeat for three sets of 15 to 20 repetitions on each side.

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Continue alternating in a pedaling motion while keeping your core engaged throughout.

Repeat for three sets of 20 to 25 repetitions on each side.

Engage your core, and bring your right knee toward your chest, keeping your left leg extended.

woman doing side bend with arm extension

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Quickly switch legs, bringing your right leg back and your left knee toward your chest.

Continue alternating legs in a running motion while keeping your core tight and your hips level.

Repeat for three sets of 30 to 45 seconds.

woman performing reverse crunch, legs raised to lose weight fast

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Maintain control throughout the movement, and avoid arching your back.

Repeat for three sets of 12 to 15 repetitions on each side.

Extend your left arm overhead, keeping it aligned with your left ear.

Slowly bend your upper body to the right, feeling a stretch along your left side.

Repeat for three sets of 15 to 20 repetitions on each side.

Reverse Crunches

These exercises for a slimmer core wrap up with the reverse crunch.

Reverse crunches target the lower abs, helping to tone and tighten the lower part of your core.

Engage your core, and lift your hips off the floor, bringing your knees toward your chest.

Lower your legs back toward the ceiling with a controlled movement, avoiding swinging or using momentum.

Repeat for three sets of 15 to 20 repetitions.