Also known as: tuck crunch, tuck sit-up, glute-hug crunch, core tuck, bodyweight tuck crunch

What is Ball Crunches?

Ball Crunches are a medium-level bodyweight core exercise that forms a tucked 'ball' shape by hugging the legs, primarily targeting the rectus abdominis and deep core stabilizers. They build core endurance and spinal flexion control when performed with slow, controlled reps and proper breathing.

How to Do Ball Crunches

  1. Set starting position: Lie on your back, legs straight and slightly lifted so only glutes and lower back touch the floor; arms relaxed by sides.
  2. Engage your core: Draw your navel toward your spine, brace abs, and maintain neutral neck alignment to protect lower back during the whole movement.
  3. Tuck legs upward: Slowly bend and lift legs toward your chest, keeping them straight if possible or slightly bent to reduce lumbar strain.
  4. Crunch into ball: Curl your upper body forward to wrap your arms around the legs, using abdominal contraction not momentum; exhale during the upward phase.
  5. Lower with control: Slowly extend your torso back to the start, keeping core engaged and lower back contact steady; inhale as you lower with control.
  6. Repeat and breathe: Perform intended reps with steady breathing - exhale up, inhale down; pause briefly at the top to maintain tension and protect form.

Muscle Groups

Core

Description

Lay flat on the ground facing up. Engage your core and keep your upper back off the floor.

Sligthly lift your straight legs so that only your glutes and lower back are in contact with the ground.

From that position, crunch up to form a "ball" with your body, surrounding your tucked legs with your arms.

Slowly lay back down without losing engagement to connect consecutive reps until the goal is reached.
Movement Group: Core
Equipment: None (bodyweight only)

Progressions and Regressions

None

Frequently Asked Questions

What are the benefits of Ball Crunches?

Ball Crunches build core strength, improve abdominal endurance, and train spinal flexion control. They require no equipment and can help posture and stability when performed with proper form and progressive loading.

What common mistakes should I avoid?

Common mistakes include using momentum instead of abs, pulling on the neck, arching the lower back, and dropping the legs. Fixes: slow controlled reps, tuck chin lightly, maintain neutral spine, and keep constant core engagement.

How can I progress or regress Ball Crunches?

To progress, increase reps, slow the tempo, add light resistance (hold a plate or dumbbell), or try decline variations. To regress, bend the knees more, reduce range of motion, or perform partial crunches and hollow holds.