Lying Tuck Crunch
Lying Tuck Crunch Exercise Description
The lying tuck crunch is a floor-based core exercise that combines a traditional abdominal curl with a knee tuck to emphasize trunk flexion and posterior pelvic tilt. It primarily targets the rectus abdominis, with assistance from the external and internal obliques for trunk stabilization and from the hip flexors (e.g., iliopsoas, rectus femoris) to draw the thighs toward the torso. The goal is to approximate the ribcage and pelvis while keeping the lumbar spine gently pressed into the floor to limit excessive arching. A small, controlled range is ideal—focus on lifting the shoulder blades rather than the neck, and moving the knees without swinging. Coordinating the exhale during the curl and tuck often helps set the ribcage down and tilt the pelvis posteriorly for a strong abdominal contraction. This bodyweight movement trains precise sequencing of the upper trunk curl and leg tuck for efficient, repeatable trunk flexion mechanics.
- Muscle Groups: Abs, Core, Waist
- Target Muscles: Rectus Abdominis
- Assisting Muscles: Psoas Major, Rectus Femoris
- Stabilizing Muscles: External Obliques, Internal Obliques
- Body Area: Upper Body
- Body Parts: Core, Torso
- Body Surface: Front
- Body Symmetry: Bilateral
- Equipment: Bodyweight
- Exercise Patterns: Other
- Exercise Type: Strength
- Functional Grouping: Trunk Flexors
- Joint Involvement: Multi-joint
- Muscle Location: Stomach
- Movement Direction: Other
- Muscle Position: Anterior
- Gender: Male
How To Do The Lying Tuck Crunch Exercise
‘- Lie supine with arms by your sides, palms down.
– Bring hips and knees to about 90 degrees (shins parallel to the floor); feet together, toes relaxed.
– Set your ribs down and gently flatten your low back via a slight posterior pelvic tilt.
– Keep your neck neutral; eyes to the ceiling, chin lightly tucked.
– Exhale as you lift your head and shoulder blades off the floor while simultaneously tucking the knees toward the chest.
– Keep elbows/shoulders relaxed; let the abdominals, not the arms, drive the curl.
– Pause briefly when thighs approach the torso without yanking or bouncing.
– Inhale and return with control: lower the shoulder blades first and move the shins back to parallel, maintaining low-back contact.
– Throughout, avoid flaring the ribs, arching the lumbar spine, or swinging the legs.
– Stop the range if you feel neck strain; reduce height and keep the gaze up.
Lying Tuck Crunch Tips
‘- Before moving, set your ribs down and gently flatten your low back with a slight posterior pelvic tilt.
– Keep your lumbar spine lightly pressed into the floor and maintain that contact throughout the exercise.
– Start with hips and knees at about 90 degrees so shins are parallel to the floor, with feet together and toes relaxed.
– Keep your neck neutral by looking at the ceiling with a light chin tuck as you move.
– Focus on lifting your shoulder blades off the floor rather than leading with your neck.
– Exhale as you curl the trunk and tuck the knees toward the chest to help set the ribcage and tilt the pelvis posteriorly.
– Use a small, controlled range of motion and avoid swinging the legs or bouncing at the top.
– Let the abdominals drive the curl while keeping the elbows and shoulders relaxed instead of pulling with the arms.
– Pause briefly when the thighs approach the torso, without yanking the knees closer.
– On the way down, lower the shoulder blades first, then return the shins to parallel while keeping the low back in contact with the floor.
Lying Tuck Crunch Beginner Introduction
The lying tuck crunch is a bodyweight ab exercise performed on the floor that blends a small upper-body curl with a leg tuck. As the chest lifts slightly away from the ground and the thighs travel toward the torso, the abs and side abs handle most of the effort, with help from the hip flexors to guide the legs. The movement centers on bringing the front of the rib cage and the front of the hips nearer together while the lower back stays gently supported by the floor.
This exercise highlights careful control rather than big motions. The lift of the shoulder blades stays compact, the knees draw in without swinging, and the neck remains relaxed so the mid-section, not the head or arms, leads the action. Breathing plays a key role, with a strong exhale during the curl and tuck often deepening abdominal engagement and helping the torso settle into a stable position. Over time, this pattern encourages smooth, repeatable bending of the trunk with coordinated timing between the upper body and legs.