Hip Controlled Articular Rotation (CAR)

A fundamental movement to maintain and improve hip joint health and range of motion.

Functional Range Conditioning (FRC®) · Dr. Andreo Spina, Functional Range Conditioning (FRC®) · Limited hip mobility, hip stiffness, sensation of instability, or as a proactive measure for joint health. · Perform 3-5 repetitions per side. Each repetition should be slow and controlled, taking 10-15 seconds to complete. Integrate into a daily joint health routine or as a warm-up.

Why it works

Hip CARs systematically move the femoral head through its maximum active range within the acetabulum. This practice nourishes articular cartilage via synovial fluid exchange, trains the nervous system to control end-range positions, and reinforces neurological pathways for active range of motion, which can reduce passive tissue dependence and improve joint resilience. The controlled, slow movement at end-range specifically targets and communicates with the joint capsule and surrounding tissues, improving proprioception and mitigating neurological threat responses often associated with perceived joint vulnerability.

How to practice

Starting Position: Lie on your back with knees bent and feet flat on the floor. Alternatively, sit tall on a box or chair, maintaining a neutral spine.
Initiate Movement: Keeping the non-working leg stable, actively lift one knee towards your chest as high as possible without disturbing your pelvis or lumbar spine. This is your starting point for rotation.
External Rotation: Slowly and deliberately guide the knee outward, away from your midline, maintaining the height. Imagine painting a large arc with your knee.
Internal Rotation & Extension: As the knee moves outward and slightly downward, begin to internally rotate the hip, bringing the heel towards the opposite glute. Continue to extend the hip backward, drawing the leg down and then behind your body as if you are trying to push your foot into the ground (without actually touching if standing/seated) or away from your torso if supine.
Reverse the Movement: From the extended and internally rotated position, reverse the path. Bring the knee back towards the chest, externally rotating the hip as you lift the knee to complete the circular path.
Maintain Tension: Throughout the entire movement, maintain a constant, low-level muscle contraction (irradiation) in the surrounding hip musculature. This stabilizes the joint and enhances neurological drive.
Starting Position: Lie on your back with knees bent and feet flat on the floor. Alternatively, sit tall on a box or chair, maintaining a neutral spine.
Initiate Movement: Keeping the non-working leg stable, actively lift one knee towards your chest as high as possible without disturbing your pelvis or lumbar spine. This is your starting point for rotation.
External Rotation: Slowly and deliberately guide the knee outward, away from your midline, maintaining the height. Imagine painting a large arc with your knee.
Internal Rotation & Extension: As the knee moves outward and slightly downward, begin to internally rotate the hip, bringing the heel towards the opposite glute. Continue to extend the hip backward, drawing the leg down and then behind your body as if you are trying to push your foot into the ground (without actually touching if standing/seated) or away from your torso if supine.
Reverse the Movement: From the extended and internally rotated position, reverse the path. Bring the knee back towards the chest, externally rotating the hip as you lift the knee to complete the circular path.
Maintain Tension: Throughout the entire movement, maintain a constant, low-level muscle contraction (irradiation) in the surrounding hip musculature. This stabilizes the joint and enhances neurological drive.