Side planks are a popular and effective exercise for strengthening the core muscles, particularly the obliques. 

• Side planks target the oblique muscles, which are located on the sides of your waist.
• Lie on your side with your elbow directly beneath your shoulder and your legs stacked.
• Lift your hips, forming a straight line from head to heels.
• Hold for 20-60 seconds and switch sides.

2. Dumbbell Side Bend:

The exercise known as the dumbbell side bend works the obliques, or the muscles on either side of your abdomen. This is how the dumbbell side bend is done:

Muscles Targeted:

Obliques (side abdominal muscles)

Equipment Needed:

Dumbbells

1. Step:

• Place your feet shoulder-width apart and stand upright.
• With one hand, hold a dumbbell. For increased resistance, use a heavier weight; for beginners, use a lighter weight.
• Keeping the dumbbell by your side, extend your arm to its maximum length.

• Maintain a straight back, an erect chest, and relaxed shoulders.
• To keep your spine stable, contract your core muscles.

3. Russian twists: 

Russian twists are a popular exercise that targets the muscles of the core, including the obliques. Here's how you can perform Russian twists:

1. Starting Position:

• With your feet flat on the floor and your knees bent, take a seat on the floor. To up the ante, you can also raise your feet a little off the ground.
• To put your torso at a 45-degree angle with the floor, slant your back a little. Maintain a straight back and contract your core.

2. Placement of Hand:

• In front of you, clap your hands together. For extra resistance, you can also hold a medicine ball or a weight.

3. Go Back to the Center:

• As you come back to the center, take a breath and turn to the opposite side.

4. Recurrences:

For the desired amount of time or repetitions, repeat the movement.

Tips:

• Keep your movements controlled and deliberate to engage your core muscles effectively.
• Focus on rotating your torso from the waist, rather than just moving your arms.
• Don't rush the exercise; maintain proper form throughout.

4. Crab kick:

HOW TO DO

• With your feet together and your knees bent, take a seat on the mat and put your hands behind your back, fingers pointing backward.

• Raise your right leg up and raise your hips off the mat.

• Repeat with your other leg. Continue switching legs until the entire set is finished.

Sets And Reps

Crab kicks can be performed for 30 to 1 minute, or in two or three sets of 12 to 16 repetitions. If you're just starting out, go slowly and concentrate especially on your form. You will be able to pick up the pace as you become more accustomed to this workout.

5. Bicycle crunches:

Bicycle crunches are a popular abdominal exercise that targets multiple muscles in the core, including the rectus abdominis and obliques. Here's how you can perform bicycle crunches:

1. Starting Position:

• Lie on your back on a mat or a comfortable surface.
• Place your hands behind your head, elbows bent, and lift your legs off the ground with your knees bent at a 90-degree angle.

2. Performing the Crunch:

• Lift your head, shoulders, and feet off the ground.
• As you lift, bring your right elbow and left knee toward each other in a twisting motion, while straightening your right leg.

4. Breathing:

• Exhale as you twist and bring your elbow and knee together.
• Inhale as you straighten your leg and return to the starting position.

Tips:

• Focus on quality over quantity. Ensure you're performing each repetition with proper form.
• Keep your elbows back and avoid pulling on your neck during the movement to prevent strain.
• Engage your core muscles throughout the exercise to maximize the benefits.