Crab Knee To Elbow
Crab Knee To Elbow Exercise Description
Crab Knee to Elbow is a bodyweight core drill performed from the crab (reverse tabletop) position. You support your body on hands and heels while lifting the hips, then drive one knee toward the opposite elbow with controlled trunk rotation. The movement challenges the anterior core—rectus abdominis and the internal/external obliques—while hip flexors initiate the knee drive and glutes/hamstrings co-contract to keep the hips lifted. Shoulders work in closed‑chain extension, with the posterior deltoid, triceps, rotator cuff, and scapular stabilizers maintaining a stable base. Expect coordination and total‑body tension demands as you resist shoulder shrugging and lumbar arching, keeping a neutral spine and level pelvis. Use smooth, deliberate reps, prioritizing range you can control without letting the hips drop or the ribs flare.
- Muscle Groups: Abs, Core, Obliques, Waist
- Target Muscles: External Obliques, Internal Obliques, Rectus Abdominis
- Assisting Muscles: Psoas Major, Rectus Femoris
- Stabilizing Muscles: Biceps Femoris - Long Head, Deltoid - Posterior, Gluteus Maximus, Trapezius - Middle Fibers, Triceps Brachii - Long Head
- Body Area: Upper Body
- Body Parts: Core, Torso
- Body Surface: Front, Side
- Body Symmetry: Unilateral
- Equipment: Bodyweight
- Exercise Patterns: Other
- Exercise Type: Strength
- Functional Grouping: Trunk Flexors, Trunk Lateral Flexors, Trunk Rotators
- Joint Involvement: Multi-joint
- Muscle Location: Deep Side Abs, Side Abs, Stomach
- Movement Direction: Rotational
- Muscle Position: Anterior, Lateral
- Gender: Male
How To Do The Crab Knee To Elbow Exercise
‘- Sit on the floor, knees bent, feet flat hip‑width. Place hands behind you, fingers pointing toward feet or slightly outward.
– Spread the fingers. Grip the floor lightly and set wrists under or just behind shoulders.
– Straighten elbows softly; depress shoulders (away from ears) and open the chest.
– Brace lightly. Press through hands and heels to lift the hips until trunk and thighs form a straight line.
– Keep a neutral neck (gaze up/forward), ribs down, and pelvis level.
– Maintain pressure through the supporting hand and heel. Do not let shoulders roll forward.
– Drive the right knee toward the left elbow by flexing the hip and rotating the torso. Aim to meet or approach—no collapsing through the chest.
– Keep the supporting elbow near extension without locking; shoulders remain depressed and stable.
– Control the return: place the right foot back under the knee without dropping the hips.
– Repeat on the other side, matching range and tempo.
– Common checks: palms planted, wrists comfortable angle; hips lifted; no low‑back sag; breathe out on the knee drive and in as you reset.
Crab Knee To Elbow Tips
‘- Place hands behind you with fingers pointing toward your feet or slightly outward.
– Spread your fingers and grip the floor lightly with wrists under or just behind your shoulders.
– Straighten your elbows softly and depress your shoulders away from your ears while opening your chest.
– Lift your hips until your trunk and thighs form a straight line, keeping your pelvis level and ribs down.
– Keep a neutral neck with your gaze up or slightly forward.
– Maintain firm pressure through the supporting hand and heel so the shoulders don’t roll forward.
– Drive the knee toward the opposite elbow by flexing the hip and rotating the torso, aiming to meet or approach without collapsing through the chest.
– Keep the supporting elbow near extension without locking it out.
– Control the return of the foot under the knee without letting the hips drop or the low back sag.
– Match range of motion and tempo on both sides.
– Keep palms planted at a comfortable wrist angle throughout.
– Breathe out on the knee drive and in as you reset.
Crab Knee To Elbow Beginner Introduction
Crab Knee to Elbow is a bodyweight core exercise performed in a face‑up support position, with hands and heels on the ground and the hips raised off the floor. From this bridge‑like setup, one leg alternates driving in toward the opposite arm while the torso turns, creating a dynamic, cross‑body motion. The movement highlights the abs and side abs as they work together with the hip flexors to bring the knee forward, while the glutes and backs of the thighs work to keep the hips lifted.
Because the hands stay planted, the shoulders, upper arms, and upper back provide a strong platform for the lower body to move under control. This demands steady shoulders, a naturally aligned spine, and a pelvis that stays steady as the legs move. The combo of rotation, hip lift, and arm support brings in coordination and full‑body tension, linking the upper and lower body in one flowing pattern rather than isolating a single area.