Get Started With Active Isolated Stretching

Active Isolated Stretching (AIS) is a dynamic, targeted approach to flexibility and mobility training that differs from traditional static stretching. Developed by Aaron Mattes, AIS is designed to safely lengthen muscles and connective tissues while respecting the body’s natural protective reflexes. Unlike long-held static stretches, AIS uses short, repeated holds—typically 1–2 seconds—allowing muscles to gradually release without triggering resistance or strain.

The methodology is simple yet highly effective. Each stretch is performed actively, meaning the working muscles engage to support the movement, while the opposing muscles relax. Repeating this process several times helps increase range of motion, improve circulation, and enhance muscle recovery. It’s a system that works for beginners, athletes, yoga practitioners, and anyone looking to maintain or restore functional mobility.

Historically, AIS gained recognition in the 1980s as a rehabilitative and performance-enhancing technique. Its gentle, precise approach makes it relevant for both everyday fitness and specialized disciplines like yoga, martial arts, dance, and sports. By combining anatomical understanding with mindful execution, AIS not only improves flexibility but also encourages body awareness and safe movement patterns.

Below, you’ll find a series of video tutorials demonstrating AIS for different body parts—shoulders, hips, spine, wrists, and more—so you can explore the method hands-on and integrate it into your daily practice.

Psoas Sequence

Activate:

Stretch:

The psoas plays a key role in hip flexion, spinal stability, and gait, so restoring its normal range of motion is essential. In healthy movement, the hip should comfortably extend behind the body without compressing the lower back or tipping the pelvis forward. As you work through this sequence, you should feel a gentle, lengthening stretch across the front of the hip, not pressure in the lumbar spine.


Rotator Cuff Sequence (External & Internal Rotation)

Activate:

Stretch:

Healthy shoulder function requires a balanced range of internal and external rotation, typically around 70–90° of external rotation and 60–70° of internal rotation, depending on individual structure. In this sequence, aim for a sensation of gentle rotation inside the joint, not pinching at the front of the shoulder or strain in the neck.

When performed correctly, you’ll feel a smooth, targeted stretch across the back of the shoulder during internal rotation work, and a broad opening through the chest and front-shoulder during external rotation work. Keep the ribcage quiet and the breath steady—this helps the rotator cuff muscles engage precisely and protects the joint.


Wrist, Hands & Fingers Sequence

Activate:

Stretch:

Healthy hand and wrist function depends on maintaining balanced strength and mobility through both the forearm muscles and the small intrinsic muscles of the hand. A normal range of motion includes approximately 70–90° wrist extension70–80° wrist flexion, and smooth, pain-free movement through finger opening and closing.

As you work through this sequence, look for a gentle, lengthening stretch across the palm or forearm, without numbness, tingling, or compression at the wrist. You should feel activation in the small muscles that support grip and dexterity, and a sense of spaciousness returning to the joints.

This sequence is especially helpful for anyone practicing yoga, handstands, typing frequently, or dealing with stiff or overworked hands.


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Calf, Shin, Foot Sequence


Piriformis Sequence


Full Neck Sequence


Hamstrings Sequence


Chest Sequence


Psoas Side Sequence

Activate:

Stretch:


Normal Range of Motion & What to Feel For

Hip Extension (side-lying AIS psoas stretch)

Hip Extension with Slight External Rotation

Bent-Knee Variation (rectus femoris included)


What Healthy Psoas Movement Should Feel Like

A subtle but deep sensation—much less surface-level than quad stretching.

No pulling in the low back; the lumbar spine should feel long and neutral.

The hip opens without the pelvis rotating or the ribs flaring.

After the sequence, you should feel:

lighter in the lower back

freer in standing and walking

more spacious in the front body

improved hip extension in poses like Warrior IUstrasana, and Up Dog


Full Body Stretch Class (Free)

Enjoy a complete, guided stretch session designed to open the entire body from head to toe. This class blends gentle mobility work, Active Isolated Stretching principles, and breath-led movement to release tension in the shoulders, spine, hips, legs, and feet.

Perfect for beginners and experienced practitioners alike, this free class helps improve flexibility, posture, and overall ease in your daily movement. Roll out your mat, follow along, and give your whole body the refresh it deserves.


Ilio-Tibial Band (IT Band) Sequence


Rhomboid/Rotator Cuff Sequence

Activate:

Stretch:


Range of Motion & What to Feel For

Healthy horizontal adduction allows the arm to move comfortably 10–20° past the midline of the chest without shoulder elevation or rotation. As you bring the arm across the body, you should feel a broad, spreading stretch between the shoulder blade and the spine, sometimes extending into the back of the shoulder.

Look for:

Avoid:

Performed with the 1–2 second AIS rhythm, this stretch helps release tightness in the rhomboids while restoring balance to the posterior shoulder.

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