Weighted Crunch With Bent Knee
Weighted Crunch With Bent Knee Exercise Description
The Weighted Crunch (bent knee) on a stability ball targets the rectus abdominis, with the obliques assisting as stabilizers. The ball supports the natural spinal curve and permits a controlled start from slight extension into trunk flexion, emphasizing ribcage-to-pelvis movement rather than hip flexion. Holding a small external load close to the chest increases resistance while helping avoid neck strain. With feet grounded and knees bent, you create a stable base so the pelvis stays relatively still and the thoracic spine performs the motion. Key points are a neutral cervical spine, steady abdominal bracing, smooth breathing, and avoiding excessive range or bouncing. Done correctly, it’s a precise, small-range flexion exercise that builds control and trunk stability through clean technique.
- Muscle Groups: Abs, Core, Waist
- Target Muscles: Rectus Abdominis
- Assisting Muscles: External Obliques
- Stabilizing Muscles: Gluteus Maximus, Internal Obliques, Multifidus, Transversus Abdominis
- Body Area: Upper Body
- Body Parts: Core, Torso
- Body Surface: Front
- Body Symmetry: Other
- Equipment: Stability Ball
- Exercise Patterns: Other
- Exercise Type: Strength
- Functional Grouping: Trunk Flexors
- Joint Involvement: Single-joint
- Muscle Location: Stomach
- Movement Direction: Other
- Muscle Position: Anterior
- Gender: Female
How To Do The Weighted Crunch With Bent Knee Exercise
‘- Select a ball that puts hips and knees near 90° when seated; place feet flat, hip-width apart.
– Sit on the ball, then walk your feet forward until your lower–mid back rests on the ball; keep pelvis neutral and glutes lightly engaged.
– Hold a small weight against your chest with forearms crossed; keep elbows in. Do not place a weight behind your head.
– Set a neutral neck (slight chin tuck, gaze up) and brace by drawing the ribs down toward the pelvis.
– Exhale and curl the ribcage toward the pelvis to lift the shoulder blades off the ball; move through the thoracic spine, not the hips.
– Pause briefly, maintaining tension without jutting the chin or flaring the ribs.
– Inhale and lower slowly until the shoulders just touch the ball; avoid dropping or hyperextending the lower back.
– Keep feet rooted and the ball steady; avoid bouncing, pulling on the neck, or letting the weight drift away from your chest.
Weighted Crunch With Bent Knee Tips
‘- Select a ball that puts your hips and knees near 90° when you sit on it.
– Place your feet flat, hip-width apart, and walk forward until your lower–mid back rests on the ball.
– Keep your pelvis neutral and your glutes lightly engaged so the pelvis stays relatively still.
– Hold a small weight tight to your chest with your forearms crossed and elbows in; do not place a weight behind your head.
– Maintain a neutral neck with a slight chin tuck and your gaze up.
– Brace by drawing your ribs down toward your pelvis and keep steady abdominal tension.
– As you exhale, curl your ribcage toward your pelvis to lift your shoulder blades off the ball, moving through the thoracic spine rather than the hips.
– Pause briefly at the top without jutting your chin or flaring your ribs.
– Inhale and lower slowly until your shoulders just touch the ball, avoiding dropping or hyperextending your lower back.
– Keep your feet rooted and the ball steady, avoiding bouncing, pulling on your neck, or letting the weight drift away from your chest.
Weighted Crunch With Bent Knee Beginner Introduction
The Weighted Crunch (bent knee) on a stability ball is a controlled core move that highlights the abs while the side abs assist in steadying the body. The curved surface of the ball lets the torso begin from a slightly arched position and then curl forward, so the action mainly comes from the ribs moving toward the hips instead of from the legs. Bent legs with feet planted on the floor create a solid base, allowing the upper back to roll over the ball in a short, precise range.
A light weight held close to the chest adds extra challenge for the midsection without placing extra tension on the neck. The neck stays long and neutral, the stomach area stays engaged, and breathing stays calm and rhythmic as the shoulders rise and lower over the ball. Movement is smooth and deliberate rather than swinging or bouncing, turning this into a focused exercise for building core control, stability, and awareness of how the ribcage and pelvis work together.