Lying Knee Tuck
Lying Knee Tuck Exercise Description
The lying knee tuck is a floor-based core exercise that trains controlled spinal flexion and pelvic posterior tilt. It primarily challenges the rectus abdominis while the transverse abdominis and obliques assist with trunk stability; the hip flexors contribute by bringing the thighs toward the torso. The goal is to curl the pelvis off the floor with the abdominals, not swing the legs with momentum. Keeping the lumbar spine from arching emphasizes abdominal engagement and reinforces lumbopelvic control. Performed smoothly with a steady breath, this movement builds awareness of how the ribcage, pelvis, and hips coordinate during flexion.
- Muscle Groups: Abs, Core, Waist
- Target Muscles: Rectus Abdominis
- Assisting Muscles: Iliacus, Psoas Major
- Stabilizing Muscles: External Obliques, Internal Obliques, Transversus Abdominis
- 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 Knee Tuck Exercise
‘- Lie on your back with arms by your sides, palms down; keep your head and neck relaxed.
– Set your core: lightly draw ribs down, brace the abdomen, and posteriorly tilt the pelvis so your low back is gently in contact with the floor.
– Bring knees to about 90 degrees and lift feet so shins are parallel to the floor, hip-width apart.
– Exhale as you draw knees toward your chest by curling your pelvis up, lifting the tailbone slightly off the floor; keep shoulders down.
– Keep thighs and knees moving as one unit; avoid kicking or heaving the legs.
– Maintain the abdominal brace; do not let the low back arch away from the floor.
– Inhale as you lower with control: uncurl the spine slowly and return knees over hips, then hover feet without letting heels slam down.
– Keep the neck neutral (gaze up), and use hands for light floor pressure—not to yank the torso.
– Stop the range before losing control or lumbar contact.
Lying Knee Tuck Tips
‘- Before moving, lightly draw the ribs down, brace the abdomen, and posteriorly tilt the pelvis so the low back is gently in contact with the floor.
– Focus on curling the pelvis up to lift the tailbone slightly off the floor, rather than swinging the legs with momentum.
– Keep the lumbar spine from arching away from the floor throughout to emphasize abdominal engagement and lumbopelvic control.
– Move the thighs and knees as one unit, and avoid kicking or heaving the legs toward the chest.
– Exhale as you draw the knees toward your chest; inhale as you lower back with control.
– Lower by slowly uncurling the spine, returning the knees over the hips, and hovering the feet instead of letting the heels slam down.
– Keep the shoulders down, neck neutral, and gaze up so the head and neck stay relaxed.
– Use the hands for light floor pressure only, not to yank or pull the torso.
– Perform each rep smoothly and under control, and stop the range before you lose control or lose lumbar contact.
Lying Knee Tuck Beginner Introduction
The lying knee tuck is a floor-based core move performed face-up, with the legs lifted and bent. The main action comes from the abs curling the pelvis so the tailbone gently rises, while the thighs travel toward the torso. The deep abs and side abs contribute to keeping the middle of the body steady, and the hip flexors assist in guiding the legs in. This combination turns a simple leg movement into a focused curl through the midsection rather than a swinging motion.
Throughout the exercise, the lower back stays closely connected with the floor, which encourages strong control around the hips and waist. Smooth, even breathing pairs with the motion so that the trunk, pelvis, and legs work together as one coordinated unit. This makes the lying knee tuck useful not only for strengthening the abs, but also for building awareness of how the front of the body rounds and unrounds during small, controlled flexing of the spine.