Crab Knee-to-Elbow

• Core activation: 2 sets × 6–8 reps per side with slow control
• General strength: 3 sets × 8–12 reps per side with 45–75 seconds rest
• Conditioning finisher: 3–4 rounds × 20–30 seconds, alternating sides continuously
• Coordination practice: 2–3 sets × 5–8 reps per side using a pause at the top
• Advanced core endurance: 3–5 sets × 12–16 total alternating reps while keeping hips lifted

Progression rule: First improve hip height, balance, and clean knee-to-elbow contact. Then increase reps, time under tension, or tempo speed only if your shoulders and wrists stay comfortable.

1. Sit on the floor: Bend both knees and place your feet flat about hip-width apart.
2. Place your hands behind you: Keep palms on the floor with fingers angled slightly outward or toward your feet, depending on wrist comfort.
3. Lift into a crab base: Press through your hands and feet, then lift your hips so your torso is supported off the floor.
4. Open the chest: Keep the shoulders pulled back gently without shrugging toward the ears.
5. Brace the core: Tighten your midsection enough to prevent the hips from dropping as one leg moves.
6. Find balance: Keep your weight evenly distributed through both hands and the supporting foot before starting the first rep.

If your wrists feel limited, warm them up first or slightly rotate the fingers outward. Do not force a hand angle that creates joint discomfort.

1. Begin in the crab position: Keep both hands and both feet grounded with hips lifted and chest open.
2. Lift one knee: Bring one knee up and inward toward the center of your body.
3. Rotate slightly: Turn your torso just enough to bring the opposite elbow toward the lifted knee.
4. Reach knee and elbow together: Crunch across the body until the knee and opposite elbow meet or come close.
5. Pause briefly: Hold the top position for a short moment while keeping the hips from collapsing.
6. Return with control: Place the foot back down and return the supporting arm to a stable position.
7. Switch sides: Repeat the same pattern with the opposite knee and opposite elbow.
8. Continue alternating: Move side to side with steady rhythm, clean balance, and controlled breathing.

• Keep the hips active: Do not let the hips drop heavily toward the floor during the knee drive.
• Use a controlled cross-body crunch: The knee and opposite elbow should move toward each other with intention.
• Do not over-rotate: A small torso turn is enough. Excessive twisting can reduce control.
• Press through the floor: Keep the supporting hand strong so the shoulder does not collapse.
• Relax the neck: Keep the head neutral instead of throwing it forward during the crunch.
• Control the return: Place the foot down softly instead of dropping it back to the floor.
• Avoid rushing: Moving too fast often turns the exercise into swinging instead of core training.
• Modify when needed: Keep hips lower, reduce range, or perform slower single reps if balance is difficult.
• Watch wrist comfort: Adjust hand angle or use a mat if the floor creates pressure.
• Breathe steadily: Exhale as knee and elbow move together, then inhale as you return.

• Exercise Mat — adds comfort and grip for hands, feet, and floor-based core exercises
• Wrist Support Wraps — helpful if your wrists need extra support during crab-position exercises
• Push-Up Handles — can reduce wrist extension for some users while supporting bodyweight movements
• Core Sliders — useful for related dynamic core drills and advanced bodyweight progressions
• Resistance Bands Set — useful for pairing this exercise with glute bridges, rows, and shoulder stability work

Tip: Equipment is optional. For this exercise, clean technique, stable hands, and controlled hip position matter more than adding extra resistance.