Elbow To Knee Sit-Up
Elbow To Knee Sit-Up Exercise Description
Elbow to Knee Sit-up is a bodyweight trunk flexion with rotation exercise that targets the rectus abdominis and the external and internal obliques. From a supine position, you lift the shoulders and rotate the ribcage to bring one elbow toward the opposite knee, emphasizing controlled spinal flexion and thoracic rotation. Keeping the elbows wide and the hands light (not pulling) helps maintain a neutral cervical spine. A gentle posterior pelvic tilt with abdominal bracing focuses the work on the trunk and limits excessive hip flexor dominance common in full sit-up patterns. Use a smooth, no‑momentum tempo—lift until the shoulder blades clear the floor, rotate through the upper/mid back, and return under control. This variation reinforces coordinated core bracing, segmental flexion, and rotational control using only body weight.
- Muscle Groups: Abs, Obliques, Waist
- Target Muscles: External Obliques, Internal Obliques
- Assisting Muscles: Rectus Abdominis
- Stabilizing Muscles: Multifidus, Quadratus Lumborum, 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: Multi-joint
- Muscle Location: Deep Side Abs, Side Abs
- Movement Direction: Rotational
- Muscle Position: Lateral
- Gender: Female
How To Do The Elbow To Knee Sit-Up Exercise
‘- Lie on your back; knees bent about 90°, feet flat hip‑width on the floor.
– Place fingertips lightly at your temples or cross arms over your chest; keep elbows open.
– Set the ribs down and gently posteriorly tilt the pelvis to lightly flatten your lower back; brace the abdominal wall.
– Keep a neutral neck with a slight chin tuck; eyes to the ceiling.
– Exhale; initiate by drawing ribs toward pelvis, lifting head and shoulder blades.
– Rotate the thorax to bring the right elbow toward the left knee; move from the trunk, not the arms.
– Keep elbows wide; do not pull on your head or neck.
– Pause briefly with shoulder blades off the floor while maintaining the brace.
– Inhale; lower the torso with control to the start.
– Repeat to the other side, keeping feet planted and the pelvis quiet; avoid bouncing, yanking, or leading with the elbows.
– Stop the range if the lower back arches or control is lost.
Elbow To Knee Sit-Up Tips
‘- Before you start, gently posteriorly tilt your pelvis to lightly flatten your lower back and brace your abdominal wall.
– Keep your fingertips light at your temples and your elbows wide so you don’t pull on your head or neck.
– Maintain a neutral neck with a slight chin tuck and keep your eyes on the ceiling throughout.
– Initiate each rep by drawing your ribs toward your pelvis to lift your head and shoulder blades off the floor.
– Rotate from your thorax to bring the elbow toward the opposite knee, rather than leading with the arms.
– Keep your feet planted and your pelvis quiet as you rotate side to side.
– Use a smooth, no‑momentum tempo and avoid bouncing or yanking yourself up.
– Briefly pause with your shoulder blades off the floor while maintaining your abdominal brace.
– Lower your torso back down with control on each rep.
– Stop or reduce your range of motion if your lower back starts to arch or you lose control.
Elbow To Knee Sit-Up Beginner Introduction
In the Elbow to Knee Sit-up, the body works against its own weight while a small curl of the torso combines with a twist toward the opposite leg. Performed from a lying position, the ribs travel toward the pelvis as the shoulders rise from the floor, bringing one elbow in the direction of the far knee. The emphasis stays on the abs and side abs, with the hands resting lightly so the neck stays relaxed and the upper body lift comes from the midsection rather than from pulling with the arms.
This variation uses a gentle tuck of the hips and firm bracing through the trunk to shift effort away from the front of the hips and into the core. Only a short range is needed, just high enough for the shoulder blades to clear the ground while the upper and middle back rotate. A slow, no-swing rhythm highlights control during both the lift and the return, encouraging precise timing between bracing, curling, and twisting. As a result, the exercise suits anyone interested in building coordinated, rotational abdominal strength using only bodyweight.