Side Plank Side Crunch

Side Plank Side Crunch Exercise Description

The Side Plank Side Crunch combines a stable side plank with a controlled, same-side knee‑to‑elbow crunch. It primarily targets the lateral core—especially the external and internal obliques—while the transverse abdominis and quadratus lumborum help maintain trunk and pelvic alignment. The bottom hip’s gluteus medius/minimus and the shoulder stabilizers (serratus anterior, rotator cuff, and deltoid) contribute to keeping the body lifted and the shoulder packed. This variation adds dynamic trunk flexion and hip flexion to a classic anti‑lateral‑flexion position, increasing demand on core control without external load. Proper execution emphasizes a neutral spine, stacked shoulders and hips, and minimal torso rotation as the rib cage moves toward the pelvis on the top side. It’s a bodyweight drill that challenges lateral stability, coordination, and precise movement under tension.

Muscle Groups: Abs, Obliques, Waist
Target Muscles: External Obliques, Internal Obliques
Assisting Muscles: Psoas Major, Rectus Abdominis
Stabilizing Muscles: Gluteus Medius, Infraspinatus, Quadratus Lumborum, Serratus Anterior, Transversus Abdominis
Body Area: Upper Body
Body Parts: Core
Body Surface: Side
Body Symmetry: Other
Equipment: Bodyweight
Exercise Patterns: Other
Exercise Type: Strength
Functional Grouping: Trunk Lateral Flexors, Trunk Rotators
Joint Involvement: Multi-joint
Muscle Location: Deep Side Abs, Side Abs
Movement Direction: Other
Muscle Position: Lateral
Gender: Male

How To Do The Side Plank Side Crunch Exercise

‘- Lie on your side with your forearm on the floor, elbow directly under shoulder; legs extended with feet stacked or lightly staggered.
– Press through the forearm and edge of the bottom foot to lift into a side plank; form a straight line from head to heels with hips and shoulders stacked.
– Place the top hand lightly behind your head; keep the neck neutral and brace the abdominals while gently squeezing the glutes.
– Exhale as you draw the top knee toward your chest and bring the top elbow toward that knee, creating a small, controlled side crunch.
– Keep the bottom hip lifted and the torso square—avoid rotating toward the floor or ceiling.
– Inhale to return to the long, straight side plank, extending the top leg back to the start.
– Maintain shoulder position: forearm presses down, shoulder stays depressed and stable—avoid shrugging.
– Keep the pelvis level; do not let it sag or hike. Think “ribs down, spine long.”
– Avoid pulling on your head with the hand. The elbow moves because the trunk flexes, not because the neck bends.
– To reduce difficulty, place the bottom knee on the floor or keep the top hand on your hip while performing the crunch.

Side Plank Side Crunch Tips

‘- Stack your elbow directly under your shoulder and press through the forearm and edge of the bottom foot to lift into the plank.
– Form a straight line from head to heels with hips and shoulders stacked, maintaining a neutral spine.
– Lightly place the top hand behind your head and keep your neck neutral—do not let the head pull forward.
– Brace your abdominals and gently squeeze your glutes before and during the side crunch.
– Exhale as you draw the top knee toward your chest and bring the top elbow toward that knee in a small, controlled crunch.
– Keep the bottom hip lifted and the torso square; avoid rotating toward the floor or ceiling.
– Inhale as you return to the long, straight side plank, fully extending the top leg back to the start position.
– Press the forearm down and keep the working shoulder depressed and stable—avoid shrugging.
– Keep the pelvis level so it doesn’t sag or hike; think “ribs down, spine long” throughout the movement.
– If needed, reduce difficulty by placing the bottom knee on the floor or keeping the top hand on your hip instead of behind your head.

Side Plank Side Crunch Beginner Introduction

The Side Plank Side Crunch blends a held side plank position with a small, same-side curling motion, creating a demanding bodyweight core drill. The body balances on the lower forearm and leg while the upper elbow and knee move closer together, so the side abs and deep abs handle both support and movement. The side of the lower back, upper glutes, and shoulders also share the load, helping the torso stay steady and lifted as the top side of the rib cage and pelvis come toward each other.

This exercise highlights control more than speed. The shape of the body stays long and aligned while the crunch itself is relatively short and precise, encouraging strong posture through the trunk rather than big, swinging motions. Because the hips and shoulders stay stacked and the middle of the body resists twisting, the move challenges sideways stability and coordination at the same time. An easier version exists with the lower knee resting on the floor or the upper hand placed on the hip, which decreases the support demands while preserving the same core pattern.