👉Today’s video shows the anatomy of a full-thickness rotator cuff tear with retraction—a more advanced injury pattern where the torn tendon pulls away from its normal attachment on the humeral head.

🔎Rotator cuff tears most commonly involve the supraspinatus tendon, but larger tears may extend into the infraspinatus or subscapularis, creating greater disruption in the force-couple mechanics that keep the humeral head centered during arm elevation.

🧠Some individuals with larger tears respond well to targeted loading programs that improve surrounding musculature and optimize shoulder mechanics, while others—depending on their tear size, symptoms, and goals—may require surgical consultation.

📚When we raise our arms overhead, the motion is shared between the shoulder joint (glenohumeral joint) and the scapula moving on the rib cage (scapulothoracic joint). This coordinated pattern is known as scapulohumeral rhythm and allows for smooth, efficient motion when reaching overhead.

🔎Classically, this rhythm has been described as about two-thirds of the movement coming from the glenohumeral joint and one-third from upward rotation of the scapula.

🧠More recent research highlights that this ratio can vary between individuals and tasks, but the key idea remains the same—overhead elevation requires both humeral motion and scapular upward rotation working together.

✅If you have pain when reaching overhead, I would recommend implementing the rotator cuff and shoulder mobility exercises in the shoulder pain program here in the app.

Hello everyone,

What program can I use for post tib tendinitis? Pain is low but feel like I need to strengthen it more.

Also, what program should I follow for pain below the back of the shoulder? Like around the tres major muscle? I think I pulled/strained during lat pull downs.

Thanks!

📚The hamstring muscles (biceps femoris, semimembranosus, and semitendinosus) run along the posterior thigh and act to flex (bend) the knee and extend the hip.

🔎Because the hamstrings serve as antagonists to the quadriceps, they are vitally important in terms of knee stability and overall lower extremity control.

🏋🏼‍♂️However, most people have a tendency to pick exercises that target the quads (also very important) and neglect the hamstrings.

✅The app includes a hamstring injury rehab program that teaches you how to heal and strengthen the hamstrings after an injury. Click the link below to access the program.

https://membership.rehabscience.com/programs/hamstring-pain?category_id=258965

📚Osteoarthritis (OA) is degenerative condition of the cartilage present in our joints and most commonly affects the knee and hip.

🔎Symptoms usually include pain, swelling, joint stiffness, limited range of motion and difficulty with many functional tasks. Severe pain or functional loss associated with OA of the knee or hip often leads to joint replacement surgery.

🧠Many individuals with OA are told that exercise will harm their joint(s) and encouraged to avoid many activities. While it is important to respect one’s symptoms and progress gradually, it should be known that properly dosed exercise can actually improve the health of cartilage. Furthermore, strengthening the muscles that surround a given joint can actually help to reduce stress on cartilage and other sensitive structures.

✅A knee osteoarthritis program can be found here in the app. Here is a link for the program.

https://membership.rehabscience.com/programs/knee-osteoarthritis?category_id=258965

📚The anterior cruciate ligament (ACL) runs obliquely from the anterior intercondylar area of the tibia up to the posteromedial aspect of the lateral femoral condyle, and plays a critical role in preventing anterior translation of the tibia relative to the femur.

🔎In this dissection, the femoral condyles roll posteriorly over the tibial plateau as the knee joint flexes, allowing the intercondylar notch to open and reveal the ACL.

🧠Visualizing the ACL during flexion highlights its functional orientation and importance in dynamic knee stability. As the femur moves on the tibia, the ACL becomes taut, particularly in mid-to-deep flexion, helping to resist excessive anterior glide and rotational forces.

✅If you need a rehab program for an injury of the ACL or another ligament in the knee, the knee ligament injury program here in the app will teach you some of the most important exercises. Here is a link for this program.

https://membership.rehabscience.com/programs/knee-ligament-injury?category_id=258965

🔎Here is a great dissection that shows how the gastrocnemius and soleus muscles blend into the Achilles tendon and how the tendon is influenced by ankle movement.

🧠During ankle dorsiflexion, we see how the Achilles tendon and calf muscles are put on tension. Then, when the ankle moves into plantarflexion, the tendon and muscles are put on slack.

✅If you are suffering from Achilles tendon issues or a calf strain, I would recommend following the calf and Achilles pain program here in the app. Here is a link for the program.

https://membership.rehabscience.com/programs/achilles-tendinopathy?category_id=261017

👉The gluteal region is much more than just the gluteus maximus. Beneath the surface lies a complex network of muscles and nerves that play an essential role in hip stability, movement, and lower extremity function.

📚The large superficial muscle shown here is the gluteus maximus, which primarily contributes to hip extension and external rotation. Beneath it sit the gluteus medius and minimus, which help stabilize the pelvis during walking, running, and single-leg activities.

🔎Deeper still are the six short external rotator muscles of the hip: the piriformis, superior gemellus, obturator internus, inferior gemellus, obturator externus, and quadratus femoris. These muscles act together to provide dynamic stability to the hip joint while assisting with rotation and controlling femoral movement during functional activities.

🧠One of the most important structures in this region is the sciatic nerve, the largest nerve in the body. It exits the pelvis and typically travels beneath the piriformis muscle before descending through the posterior hip and thigh. The sciatic nerve supplies motor and sensory function to much of the lower extremity, making it a clinically important structure in conditions involving buttock pain, posterior thigh pain, numbness, tingling, or weakness.

Tom, can you say in general whether you recommend stretch first or strength first in a daily practice or daily rehab? I see how your book is set up and I know you do mobility to start (for instance the foam roller) but then all stretch and then all strength? Or vice versa? Or back and forth between the two? Thanks!