Side Plank Oblique Crunch
Side Plank Oblique Crunch Exercise Description
The Side Plank Oblique Crunch combines a stable side plank with a small, controlled lateral flexion to emphasize the obliques while challenging the entire lateral core. You’ll maintain a long, neutral spine as you lift the hips and stabilize through the bottom shoulder and hip. Primary work targets the external and internal obliques, with assistance from the quadratus lumborum, deep abdominal wall, hip abductors (notably the gluteus medius), and shoulder girdle stabilizers. This variation adds a brief “shorten the top side” crunch, training trunk control without rotating or losing alignment. It’s a bodyweight drill that can be scaled by using the knees instead of the feet or by adjusting the range of motion, keeping quality over quantity. Expect a focused challenge to lateral trunk stability and shoulder alignment when performed with steady breathing and precise positioning.
- Muscle Groups: Abs, Obliques, Waist
- Target Muscles: External Obliques, Internal Obliques
- Assisting Muscles: Quadratus Lumborum
- Stabilizing Muscles: Gluteus Medius, Multifidus, Serratus Anterior, Transversus Abdominis, Trapezius - Lower Fibers
- Body Area: Upper Body
- Body Parts: Core
- Body Surface: Side
- Body Symmetry: Unilateral
- Equipment: Bodyweight
- Exercise Patterns: Other
- Exercise Type: Strength
- Functional Grouping: Trunk Lateral Flexors, Trunk Rotators
- Joint Involvement: Single-joint
- Muscle Location: Deep Side Abs, Side Abs
- Movement Direction: Lateral
- Muscle Position: Lateral
- Gender: Male
How To Do The Side Plank Oblique Crunch Exercise
‘- Lie on your side with legs long, feet stacked. Place your forearm on the floor, elbow directly under shoulder, palm flat.
– Brace gently (360° around your trunk), squeeze the glutes, and press the forearm into the floor to lift hips into a straight line from head to feet.
– Keep ribs stacked over pelvis, shoulders stacked, and neck neutral; look straight ahead.
– Reach your top arm toward the ceiling or place the hand lightly behind your head without pulling on the neck.
– Exhale as you “shorten” the top side: draw your top ribcage toward your top hip in a small, controlled lateral crunch. Keep hips lifted and torso facing forward—no twisting.
– Inhale to re-lengthen the top side, returning to a tall side plank while maintaining shoulder and pelvic alignment.
– Maintain active shoulder—press the floor away so you don’t sink into the bottom shoulder.
– Lower with control when finished and repeat on the other side.
– Common form checks: elbow under shoulder, hips neither sagging nor piking, steady breath, eyes forward to keep the cervical spine neutral.
Side Plank Oblique Crunch Tips
‘- Set up with legs long, feet stacked, and your forearm on the floor, elbow directly under your shoulder, palm flat.
– Before lifting, brace gently 360° around your trunk, squeeze the glutes, and press the forearm into the floor to raise the hips.
– As you lift, form a straight line from head to feet, keeping a long, neutral spine.
– Keep ribs stacked over pelvis, shoulders stacked, and neck neutral by looking straight ahead.
– Reach the top arm to the ceiling or place the hand lightly behind your head, avoiding any pull on the neck.
– Exhale as you “shorten” the top side, drawing your top ribcage toward your top hip in a small, controlled lateral crunch.
– Keep hips lifted and torso facing forward during the crunch—no twisting.
– Inhale to re-lengthen the top side, returning to a tall side plank while maintaining shoulder and pelvic alignment.
– Maintain an active bottom shoulder by pressing the floor away so you don’t sink into it.
– Use common checks: elbow under shoulder, hips neither sagging nor piking, steady breath, and eyes forward to keep the cervical spine neutral.
Side Plank Oblique Crunch Beginner Introduction
The Side Plank Oblique Crunch blends a classic side plank hold with a small side-bending motion through the waist. In this bodyweight move, the body is supported on one forearm and the side of the lower body while the top side of the torso briefly shortens and lengthens. This combination brings strong attention to the side abs, with extra support coming from the deep abs, side of the lower back, outer hip muscles, and the shoulder that is bearing weight on the floor.
Because the body stays facing forward without twisting, the challenge centers on steady posture, shoulder stability, and controlled movement through the side of the trunk. The hips stay lifted as the upper ribs and hip move slightly toward each other, then return to a long, plank-like position. A version on the knees or with a smaller bend through the waist changes the overall effort while still emphasizing careful alignment, even pressure through the supporting arm, and calm, consistent breathing.