Weighted V-Crunch (On Bosu Ball)
Weighted V-Crunch (On Bosu Ball) Exercise Description
The Weighted V-Crunch (on BOSU ball) targets the anterior core by combining trunk flexion and hip flexion while you balance on an unstable surface. Sitting on the BOSU’s dome permits a small, supported extension at the start, then a controlled flexion as you bring your torso and thighs together. Primary movers are the rectus abdominis and the external/internal obliques, with assistance from the hip flexors. The transversus abdominis and deep spinal stabilizers brace the lumbopelvic region to maintain control. Holding a dumbbell, plate, or medicine ball at the chest increases the resistance without overloading the neck or shoulders. Aim for smooth, segmental curling of the trunk—no yanking with the neck or swinging the legs. Keep the neck neutral, ribs down, and a slight posterior pelvic tilt to limit excessive lumbar extension on the descent. Expect a strong challenge to balance and trunk control due to the BOSU’s compliance; move only through a range you can stabilize.
- Muscle Groups: Abs, Core, Obliques, Waist
- Target Muscles: External Obliques, Internal Obliques, Rectus Abdominis
- Assisting Muscles: Iliacus, Psoas Major
- Stabilizing Muscles: Multifidus, Transversus Abdominis
- Body Area: Upper Body
- Body Parts: Core, Torso
- Body Surface: Front, Side
- Body Symmetry: Bilateral
- Equipment: Bosu Ball
- Exercise Patterns: Other
- Exercise Type: Strength
- Functional Grouping: Trunk Flexors, Trunk Lateral Flexors, Trunk Rotators
- Joint Involvement: Multi-joint
- Muscle Location: Deep Side Abs, Side Abs, Stomach
- Movement Direction: Other
- Muscle Position: Anterior, Lateral
- Gender: Female
How To Do The Weighted V-Crunch (On Bosu Ball) Exercise
‘- Place the BOSU dome side up. Sit centered on the dome with your sacrum on the top. Hold a small weight at your chest with both hands.
– Set your posture: ribs down, light abdominal brace, shoulders down and back, neck neutral.
– Lean back until the dome supports your lumbar curve. Lift both feet so shins are roughly parallel to the floor; keep knees softly bent.
– Exhale as you simultaneously flex the spine and hips, drawing your sternum toward your pelvis to bring torso and thighs together into a controlled “V.”
– Keep the weight close to your chest; elbows tucked. Avoid pulling on the neck or shrugging the shoulders.
– Pause briefly at the top without collapsing; maintain even pressure on both sit bones.
– Inhale as you lower the torso and legs together under control until shoulder blades approach the dome, keeping a slight posterior pelvic tilt to avoid excessive lumbar extension.
– Move smoothly without momentum; keep legs aligned and the neck in line with the torso throughout.
Weighted V-Crunch (On Bosu Ball) Tips
‘- Sit centered on the BOSU with your sacrum on the top of the dome to help maintain balance.
– Set your posture before moving: ribs down, light abdominal brace, shoulders down and back, neck neutral.
– Lean back only until the dome supports your lumbar curve, then lift your feet so shins are roughly parallel to the floor with knees softly bent.
– Exhale as you flex the spine and hips, drawing your sternum toward your pelvis to bring your torso and thighs together into a controlled “V.”
– Keep the weight close to your chest with elbows tucked to add resistance without overloading the neck or shoulders.
– Keep the neck neutral and in line with the torso; avoid yanking with the neck or shrugging the shoulders.
– Avoid swinging the legs; move them together with the torso in a smooth, controlled motion.
– Pause briefly at the top without collapsing, maintaining even pressure on both sit bones to stay balanced.
– Inhale as you lower the torso and legs together under control until your shoulder blades approach the dome.
– Maintain a slight posterior pelvic tilt on the descent and move only through a range you can stabilize to limit excessive lumbar extension and control the BOSU’s instability.
Weighted V-Crunch (On Bosu Ball) Beginner Introduction
The Weighted V-Crunch (on BOSU ball) is a core-focused movement performed seated on the rounded surface of the BOSU while holding a small weight against the chest. From a gently reclined, supported position, the upper body and legs move toward each other into a V-like shape, then return to the starting lean. This flowing action brings the abs and side abs into play, with help from the hip flexors, while the deep core and lower back stabilizers work to steady the pelvis and spine.
Because the BOSU surface shifts under you, the exercise blends strength work with balance and body control. The unstable base encourages slow, deliberate motion rather than jerking through the neck or swinging the legs. Keeping the weight close to the chest increases the challenge for the midsection without loading the neck or shoulders. The movement range is guided by how much you can control while still feeling supported on the dome, creating a demanding yet contained challenge for trunk coordination and stability.