Side Crunch

Side Crunch Exercise Description

The Side Crunch is a bodyweight trunk-flexion-with-rotation exercise that emphasizes the obliques while the rectus abdominis and deep abdominal wall assist in bracing. Performed on your back with feet grounded, it teaches you to lift the shoulders and rotate the ribcage toward the opposite hip without pulling on the neck. The movement is small and controlled, focusing on bringing the ribs toward the pelvis rather than driving the elbow to the knee. Keeping the low back gently anchored to the floor helps minimize hip flexor dominance and maintains a stable pelvis. Use smooth tempo and consistent breathing to build coordination and core control.

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: Rotational
Muscle Position: Lateral
Gender: Female

How To Do The Side Crunch Exercise

‘- Lie on your back with knees bent, feet flat and hip-width apart.
– Lightly place fingertips behind ears (or cross arms on chest); keep elbows wide and neck neutral.
– Brace your midsection and gently draw the ribcage down to lightly flatten the low back against the floor.
– Exhale, lift head and shoulder blades just off the floor, and rotate your ribcage to bring the right shoulder toward the left knee.
– Lead with the ribs, not the elbows; keep your gaze up and chin slightly tucked.
– Pause briefly at the top while maintaining abdominal tension.
– Inhale, return to the start with control without letting the low back arch.
– Repeat the lift and rotate to the opposite side, alternating sides each rep.
– Keep pelvis stable; movement comes from the upper/mid torso (thoracic rotation), not from yanking the head or twisting the hips.
– Stop the range before the low back lifts or the neck strains.

Side Crunch Tips

‘- Keep your feet flat and hip-width apart to create a stable base.
– Lightly place fingertips behind your ears or cross your arms on your chest to avoid pulling on your neck.
– Keep elbows wide and neck neutral throughout the movement.
– Brace your midsection and gently draw the ribcage down to lightly flatten your low back against the floor before you start.
– Focus on lifting your head and shoulder blades just off the floor, not higher.
– Rotate your ribcage to bring the shoulder toward the opposite knee rather than driving the elbow forward.
– Lead the rotation with your ribs, not your elbows.
– Keep your gaze up with your chin slightly tucked to help maintain a neutral neck.
– Pause briefly at the top while maintaining abdominal tension before returning down.
– Control the return to the floor without letting your low back arch.
– Keep your pelvis stable and let the movement come from the upper/mid torso, not from twisting the hips.
– Stop the movement if your low back starts to lift off the floor or your neck begins to strain.
– Use a smooth tempo and consistent breathing to build coordination and core control.

Side Crunch Beginner Introduction

The Side Crunch is a bodyweight core exercise performed on the floor that blends a small curl of the upper body with a gentle twist. Positioned face up with bent knees and feet resting on the ground, the upper body rises slightly as the ribcage rotates toward the opposite hip. This creates a strong emphasis on the side abs, while the front abs and deeper core layers assist by tightening to support the movement.

Rather than a big sweeping motion, the action stays compact and deliberate, with attention on bringing the ribs and pelvis closer together. The lower back remains lightly settled against the floor so the hips and hip flexors stay quieter and the pelvis feels steady. The neck and head move as one unit with the upper torso, reducing strain by steering effort into the midsection instead. A smooth, even rhythm and matching breath pattern help build coordination, body awareness, and a sense of controlled strength through the entire core.