Side Bridge (Knee Tuck)
Side Bridge (Knee Tuck) Exercise Description
The Side Bridge (knee tuck) is a side plank variation that builds lateral core stability while adding controlled hip flexion of the top leg. It primarily targets the external and internal obliques and quadratus lumborum to resist lateral flexion and rotation. The shoulder girdle of the support arm stabilizes (serratus anterior and rotator cuff), and the gluteus medius and surrounding hip abductors/adductors help keep the pelvis level. The knee-tuck motion recruits the hip flexors of the moving leg (iliopsoas, rectus femoris, and tensor fasciae latae), adding a thigh-focused component without equipment. This combination teaches the trunk to stay rigid as the leg moves, reinforcing neutral spine, stacked hips, and steady breathing. Use smooth, controlled motion to keep the torso quiet and the hips lifted throughout the set.
- Muscle Groups: Abs, Core, Obliques, Waist
- Target Muscles: External Obliques, Internal Obliques, Quadratus Lumborum
- Assisting Muscles: Iliacus, Psoas Major, Rectus Femoris, Tensor Fasciae Latae
- Stabilizing Muscles: Gluteus Medius, Infraspinatus, Serratus Anterior, Subscapularis
- Body Area: Upper Body
- Body Parts: Back, Core, Lower Back, Torso
- Body Surface: Side
- Body Symmetry: Unilateral
- Equipment: Bodyweight
- Exercise Patterns: Other
- Exercise Type: Strength
- Functional Grouping: Spine Stabilizers, Trunk Lateral Flexors, Trunk Rotators
- Joint Involvement: Single-joint
- Muscle Location: Deep Side Abs, Side Abs, Side Lower Back
- Movement Direction: Other
- Muscle Position: Lateral
- Gender: Female
How To Do The Side Bridge (Knee Tuck) Exercise
‘- Lie on your side with legs long, feet stacked or slightly staggered. Place your forearm on the floor with the elbow directly under the shoulder.
– Create a straight line from ears to ankles. Brace the abdominal wall and keep the neck neutral.
– Press the forearm into the floor and the edge of the bottom foot, then lift the hips into a stable side bridge.
– Stack shoulders and hips; maintain neutral spine without sagging or rotating.
– Keeping hips high, draw the top knee toward the chest using hip flexion. Exhale gently; keep the ribs down.
– Pause briefly while holding pelvic level; avoid rounding the low back or hiking the top hip.
– Return the top leg to the starting position under control without letting the torso move.
– Repeat the knee tuck with steady tempo, maintaining alignment and tension throughout, then perform on the other side.
Side Bridge (Knee Tuck) Tips
‘- Position your elbow directly under your shoulder before lifting into the bridge.
– Create a straight line from your ears to your ankles and keep your neck neutral.
– Brace your abdominal wall before you lift and maintain that tension throughout the set.
– Press firmly through your forearm and the edge of your bottom foot to lift and support your hips.
– Keep shoulders and hips stacked to maintain a neutral spine without sagging or rotating.
– As you tuck the top knee, keep your hips high and the ribs down while you exhale gently.
– Pause briefly with the knee tucked while keeping the pelvis level.
– Avoid rounding your low back or hiking the top hip during the knee tuck.
– Return the top leg under control without letting the torso move.
– Use a smooth, steady tempo to keep the torso quiet and the hips lifted for all repetitions, then repeat on the other side.
Side Bridge (Knee Tuck) Beginner Introduction
The Side Bridge (knee tuck) is a bodyweight, plank-style exercise performed on one side that blends core stability with controlled leg movement. The torso hovers off the floor in a strong side-lying bridge while the top leg draws the knee in toward the body. This creates a demanding challenge for the side abs, abs, and side lower back as they resist bending and twisting, helping the mid-section stay firm and steady. At the same time, the shoulders of the support arm work to steady the upper body, and the upper glutes and hips contribute to holding the pelvis level.
The added knee-tuck action brings in the hip flexors and front thigh of the moving leg, so the lower body works dynamically while the trunk stays solid. This teaches coordinated timing between breathing, hip motion, and core tension, emphasizing a long, aligned posture from head to legs. The result is a side plank variation that trains the body to maintain strong, consistent alignment even as the leg moves through each repetition.