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Stability Ball Knee Tucks 101 Video Tutorial

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Stability Ball Knee Tucks
Stability Ball Knee Tucks

Exercise Synopsis

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Stability Ball Knee Tucks are a dynamic core-strengthening exercise that targets the abdominal muscles as the primary focus while also engaging secondary muscle groups including the shoulders, chest, and triceps. This exercise requires minimal equipment, utilizing only body weight and a stability ball. To perform Stability Ball Knee Tucks, one starts in a plank position with the feet resting on the stability ball and hands on the floor. From this position, the individual draws the knees towards the chest by engaging the core muscles, creating a tucking motion. This movement effectively challenges the core's stability and strength while also engaging the upper body for support, making it an efficient compound exercise for building core strength and overall stability.

How to Perform

  1. Prepare the space: Ensure you have enough room for your body's length, approximately the size of a yoga mat. Optionally, lay a yoga mat down for added palm cushioning. Position the stability ball at one end of the mat before assuming the starting stance for the exercise.

  2. Starting position: Begin in a tabletop stance on the mat, aligning your knees under your hips and hands under your shoulders. The stability ball should be behind your feet. Check your alignment, maintaining a straight line from tailbone to head by engaging your abdominals and pulling your belly button toward your spine.

  3. Positioning the legs: Place one leg at a time on the stability ball, ensuring it rests between the top of your feet and the top of your shins without hindering knee movement. Adjust the ball's proximity to your body for balance—closer for ease, farther for challenge. Modify leg width for stability, closer for more challenge and wider for stability.

  4. Engage and stabilize: Inhale deeply, ensuring core engagement and shoulder alignment over wrists. Utilize your feet and shins to press down on the stability ball. Engage your abs to draw the ball toward your chest, bending your knees and tucking your lower body toward your torso. Exhale as you draw your knees forward, holding briefly at the peak.

  5. Return to plank: Extend your knees, rolling the stability ball away from your torso to return to the full plank position. Exhale as you roll the ball away, maintaining control and alignment throughout the movement.

  6. Completion and transition: Complete your desired repetitions, then carefully remove one leg at a time from the stability ball, bringing your knees back to the mat. From the tabletop position, rise to kneel, then stand. Remember, a slower pace enhances control and difficulty, making the exercise more advanced.


  1. Maintain Upper Body Alignment: When executing Stability Ball Knee Tucks, focus on maintaining proper upper body form to prevent injury and maximize effectiveness. Ensure your shoulders are aligned over your wrists and your neck is neutrally aligned, forming a straight line from head to toe.

  2. Engage Core and Stabilizers: Avoid dropping your hips, which can strain your low back and compromise the effectiveness of the exercise. Engage your abdomen and draw your belly button toward your spine to stabilize your core and maintain balance on the stability ball.

  3. Optimal Ball Positioning: Position the stability ball closer to the tops of your shins rather than your feet for better stability. As you progress, you can gradually move the ball farther down your legs to increase the challenge.

  4. Adjust Foot Placement: Experiment with separating your feet slightly, roughly hip-distance apart, to establish a broader base of support and enhance balance during the exercise.

  5. Control the Pace: Avoid rushing through the movement by rolling the ball in and out too quickly. Maintain a slow and steady pace, focusing on engaging the core muscles throughout each phase of the exercise to optimize its effectiveness.

  6. Monitor Form: Utilize a mirror to check your form and ensure your body maintains proper alignment throughout the exercise. By maintaining awareness of your form and executing the movements deliberately, you can enhance both safety and effectiveness.

How Not to Perform

  1. Avoid Arching Your Back: One common mistake is arching the back excessively during Stability Ball Knee Tucks. This not only reduces the effectiveness of the exercise by shifting the focus away from the abs but also increases the risk of lower back strain. Keep your back flat and engage your core muscles to maintain proper alignment throughout the movement.

  2. Don't Rush the Movement: Resist the urge to perform Stability Ball Knee Tucks too quickly. Rapid movements not only compromise form but also decrease the engagement of the targeted muscles. Instead, focus on controlled, deliberate movements, emphasizing the contraction of the abs with each repetition.

  3. Do Not Neglect Shoulder Stability: Neglecting proper shoulder stability can lead to poor form and potential shoulder injuries. Avoid shrugging your shoulders or allowing them to collapse toward your ears. Instead, actively engage your shoulder muscles to stabilize your upper body and maintain proper alignment.

  4. Avoid Bouncing on the Ball: Bouncing on the stability ball during knee tucks can reduce the effectiveness of the exercise and increase the risk of injury. Maintain control over the movement by avoiding sudden or jerky motions. Instead, focus on smoothly rolling the ball in and out while maintaining stability and control.

  5. Do Not Hold Your Breath: Holding your breath during Stability Ball Knee Tucks can limit oxygen flow to your muscles and decrease overall performance. Remember to breathe steadily and rhythmically throughout the exercise. Inhale as you prepare for the movement and exhale as you contract your abs to bring your knees toward your chest.

  6. Don't Let Your Hips Sag: Allowing your hips to sag during Stability Ball Knee Tucks shifts the focus away from the abs and reduces the effectiveness of the exercise. Keep your hips lifted and engage your core muscles to maintain a straight line from your shoulders to your heels. This ensures proper alignment and maximizes the engagement of the target muscles.

  7. Avoid Overextending the Range of Motion: While it's essential to achieve a full range of motion, overextending beyond your capabilities can lead to strain or injury. Focus on bringing your knees toward your chest without compromising form or stability. Only go as far as you can while maintaining control and proper alignment.

  8. Do Not Depend Solely on Momentum: Relying on momentum to perform Stability Ball Knee Tucks diminishes the workload on the abs and reduces the exercise's effectiveness. Instead, concentrate on initiating the movement from your core muscles, controlling the ball's movement with each repetition.


Variations of fitness exercises refer to different ways of performing a specific exercise or movement to target various muscle groups, intensities, or goals. These variations aim to challenge the body differently, prevent plateaus, and cater to individuals with varying fitness levels.


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Alternative exercises in fitness refer to different movements or activities that target similar muscle groups or serve the same training purpose as the primary exercise. These alternative exercises can be used as substitutes when the original exercise is unavailable or challenging to perform due to various reasons such as equipment limitations, injuries, or personal preferences.