Side Crunch
Side Crunch Exercise Description
The side crunch is a bodyweight trunk lateral flexion exercise that targets the obliques on the upper side of your body while the opposite side lengthens. Performed lying on your side, it focuses on bringing the rib cage toward the pelvis without rotating or pulling on the neck. Expect a small, controlled range of motion driven by the torso, not the arms or legs. The rectus abdominis assists, while the deep abdominal wall contributes to spinal stability as you lift and lower with control. Proper form emphasizes stacked hips and shoulders, neutral cervical alignment, and smooth breathing so the obliques do the work rather than momentum.
- Muscle Groups: Abs, Obliques, Waist
- Target Muscles: External Obliques, Internal Obliques
- Assisting Muscles: Rectus Abdominis
- Stabilizing Muscles: Multifidus, Transversus Abdominis
- 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: Female
How To Do The Side Crunch Exercise
‘- Lie on your right side on a mat; stack hips, knees, and ankles. Bend knees comfortably with feet in line with your torso.
– Keep head in line with your spine. Right arm can reach forward on the floor for balance.
– Place left fingertips lightly behind your left ear (or cross left arm over your chest). Keep elbows relaxed and wide.
– Set your ribs down and gently brace your abdominal wall; keep pelvis stacked and still.
– Exhale and lift both shoulders and upper torso a few inches by drawing your left rib cage toward your left pelvis. Think “shorten the left waist.”
– Keep your neck neutral; avoid pulling on your head or leading with the elbow.
– Pause briefly at the top with controlled tension; do not rotate your torso.
– Inhale and lower your shoulders back to the floor with control, maintaining the hip and shoulder stack.
– Keep legs quiet—no kicking or rocking. Movement comes from the trunk.
– Switch sides to work the opposite obliques, maintaining the same setup and cues.
– Common faults to avoid: yanking the neck, twisting, using momentum, or chasing excessive range that breaks alignment.
Side Crunch Tips
‘- Stack hips, knees, and ankles, with feet in line with your torso.
– Keep your head in line with your spine throughout the movement.
– Place fingertips lightly behind your ear or across your chest so you’re not pulling with the arm.
– Set your ribs down and gently brace your abdominal wall before you start lifting.
– As you exhale, lift by drawing your upper rib cage toward your pelvis, thinking “shorten the waist.”
– Keep your neck neutral and avoid leading the movement with your elbow.
– Pause briefly at the top without rotating your torso.
– Inhale as you lower your shoulders with control, keeping hips and shoulders stacked.
– Keep your legs quiet—no kicking or rocking; let the torso do the work.
– Avoid yanking the neck, twisting, using momentum, or chasing a range of motion that breaks your alignment.
Side Crunch Beginner Introduction
In the side crunch, the body starts lying on one side while the upper body gently lifts and lowers. This bodyweight movement emphasizes bending through the side of the torso so the ribs on the top side move a little closer to the hip, while the underside of the body feels long. The main work happens in the side abs, with the front abs and deep core muscles helping steady the spine so the lift feels smooth and controlled rather than jerky.
The motion is intentionally subtle, with a short, deliberate arc driven by the trunk instead of the arms or legs. Hips and shoulders stay lined up, the neck follows the spine, and breathing stays steady so the side of the waist powers the action. The legs remain quiet on the floor as the upper body rises and lowers together. Common errors include tugging on the head, twisting through the torso, swinging the limbs, or chasing a bigger crunch that disrupts alignment, all of which shift effort away from the side abs and reduce stability.