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Last updated February 2, 2026
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abs
Lying Elbow To Knee
Lie flat. Crunch up and twist to bring one elbow to the opposite knee. Switch sides. This combines a crunch with a twist for total core work.
Quick facts
- Difficulty
- Easy
- Mechanic
- Isolation
- Force
- Pull
- Type
- Strength
- Injury Risk
- Low
- Hypertrophy
- Medium
- Calorie Burn
- Medium
Muscle focus
Primary and secondary muscle groups targeted by this movement.
Primary
side abs / obliques
Secondary
abs
Equipment & setup
What you need and how to position yourself before starting.
Equipment
body weight
Movement pattern
Alternate
Posture
Lying
Tracking parameters
repsweight
Step-by-step instructions
Follow these cues to master proper technique and stay safe through every rep.
- Step 1Setup
- Lie flat on your back on a mat or exercise bench.
- Bend your knees and place your feet flat on the floor, hip-width apart.
- Step 2Position Your Arms
- Place your hands behind your head, with your elbows pointing out to the sides.
- Ensure your head is supported by your hands, and your neck is relaxed.
- Step 3Engage Your Core
- Tighten your abdominal muscles to stabilize your torso.
- Keep your lower back pressed against the mat to prevent arching.
- Step 4Lift Your Legs
- Raise your legs off the ground, bending your knees at a 90-degree angle.
- Your thighs should be perpendicular to the floor.
- Step 5Perform the Movement
- Simultaneously bring your right elbow towards your left knee while extending your right leg out.
- Focus on using your core to initiate the movement.
- Step 6Switch Sides
- Return to the starting position and repeat the movement on the opposite side.
- Bring your left elbow towards your right knee while extending your left leg out.
- Step 7Repeat
- Continue alternating sides for the desired number of repetitions.
- Maintain controlled movements and proper form throughout the exercise.
- Step 8Finish the Exercise
- After completing your reps, lower your legs back to the ground.
- Carefully sit up and stretch your body to relax your muscles.