Impact of Reverse Shoulder Arthroplasty Design and Patient Shoulder Size on Moment Arms and Muscle Fiber Lengths in Shoulder Abductors
Reverse shoulder arthroplasty (RSA) increases the moment arm of the deltoid, however there is limited knowledge on the accompanying changes in muscle architecture that play a role in muscle force production. The purpose of our study is to use a geometric shoulder model to evaluate the anterior deltoid, middle deltoid, and supraspinatus regarding 1) differences in moment arms and muscle-tendon lengths in small, medium, and large native shoulders, and 2) impact of three RSA designs on moment arms, muscle fiber lengths, and force-length (F-L) curves.
Treatments for shin splints include home remedies, activity modification, medications, and physical therapy. In rare cases, a healthcare provider may recommend procedures such as prolotherapy (an injectable treatment) and extracorporeal shock wave therapy (ESWT) (a noninvasive treatment) for shin splints.
Hip arthritis results from the breakdown of cartilage within your hip joints, causing hip stiffness and pain that can increase with inactivity, standing, and walking. Although walking can be uncomfortable and difficult with hip arthritis, walking is also incredibly important for maintaining the mobility and strength of your hips.
The Achilles tendon connects the calf muscles to the heel bone, also known as the calcaneus. If the Achilles tendon ruptures, a specific test can be done — the Achilles tendon rupture test, also called the Thompson test or calf squeeze test. Since the Achilles tendon is essential for walking and running, a tear necessitates starting treatment as soon as possible.
Arm pain can be in the upper or lower arm. You may feel arm pain on the outside of your shoulder. Arm pain can also travel further down the arm toward the elbow.