HOW TO PERFORM AN IRON CROSS FOR DISASSOCIATION
The iron cross can be helpful to establish rotational range of motion at their hips separate of the upper body. Also known as disassociation. There are a significant number of exercises that focus on disassociation of the hips and shoulders where the hips stay still and the shoulders move. Think of a split squat with arms straight forward and rotating your shoulders side to side. There are far less that work the opposite.
The simple reason is that it is hard. To rotationally move the lower body without the upper body requires you first to be in an open chain movement pattern. Second the joint(s) that actually produce enough rotational movement are found in your thoracic spine, not your lumbar spine. And your lumbar spine is closest to the hips.
STEPS FOR AN IRON CROSS
- Starting laying flat on your back with your legs straight and your arms out to the side at shoulder height, palms down. Making a T with your body.
- Brace your core and lift one leg straight up into the air. Maintaining core tension and contact with the ground at your hands and shoulders try to cross the upright leg over toward the ground.
- Once you have found your greatest range of motion, keeping your shoulders down, return the leg to upright and lower to the ground.
- Alternate legs focusing on the same key points side to side.
IMPORTANT!
Your range of motion is limited by movement at your shoulders. Remember we are trying to create movement at the hips without movement at the shoulders. This means you may need to place a box, chair, foam roller or something elevated off the ground to work towards instead of the ground. The height of this object will depend on your range of motion.
The rotation should be felt through your thoracic spine, not your low back. If for any reason this causes discomfort in your low back stop immediately. This exercises is not for you. Seek professional help if you are looking to work on your ability to disassociate your hips and shoulders.
The range of motion from your hips can be limited by the flexibility of your hamstrings and IT band. If you experience that you should consider specific stretches, for example a standing hamstring stretch. We do not agree with using this exercise to increase flexibility of your legs.
If you experience too much of a pull or any discomfort in your legs doing this exercise you should consider bending your knee to decrease the the flexibility demand. Bending the knee will also decrease the load by shortening your force arm.
WHAT TO AVOID
This is not an entry level mobility exercise. It looks simple, but demands a person be relatively mobile and highly stable to begin with. And at very least requires you to check your ego at the door and appropriately limit your range of motion. If you are new to mobility or stiff/tight start with a thoracic rotation exercise like side lying chest openers. These will still work on disassociation between the upper and lower body and help to contribute to improved thoracic rotation.
TIPS FOR IRON CROSS
- Focus on the rotation occurring through your thoracic spine. I like to envision a twist through my belly button.
- Remember upper body should stay still.
- Bending your knee will decrease the flexibility demand on your legs and decrease the force load of the exercise.
- More is not better. Work for controlled, quality movements and couple with rotational strength for the best results.
- If you have any discomfort in your low back, stop immediately.