Rotator Cuff




Muscle Roles: What is an Agonist, Antagonist, Stabilizer, Fixator or Neutralizer Muscle?

Perhaps the biggest misunderstanding about how skeletal muscles function to produce the body's movements concerns their particular role. Most people think that a muscle performs ONE particular and very defined role and that they always perform this role. This is not how it works. Muscles must work together to produce different bodily movements and a particular muscle's role may change depending on the movement.

Continue Reading » Muscle Roles: What is an Agonist, Antagonist, Stabilizer, Fixator or Neutralizer Muscle?


The Shoulder Complex: Demystifying the Shoulder with Eric Beard

The shoulder joint itself is known as the glenohumeral joint. It is a multi-axial ball and socket enarthrodial joint. This joint is the articulation between the glenoid fossa of the scapula and the head of the humerus. This is the area that most people think of as the shoulder joint. The humerus is, however, one bone of the shoulder.

Continue Reading » The Shoulder Complex: Demystifying the Shoulder with Eric Beard


Understanding Normal, Injured and Healing Ligaments And Tendons

Ligaments and tendons are soft connective tissues which serve essential roles for biomechanical function of the musculoskeletal system by stabilizing and guiding the motion of diarthrodial joints. Nevertheless, these tissues are frequently injured due to repetition and overuse as well as quick cutting motions that involve acceleration and deceleration. These injuries often upset this balance between mobility and stability of the joint which causes damage to other soft tissues manifested as pain and other morbidity, such as osteoarthritis.

Continue Reading » Understanding Normal, Injured and Healing Ligaments And Tendons


Shoulder Injury Prevention

The shoulder is a ball-and-socket joint. The head of the humerus (the bone where your biceps and triceps are) attaches into the “glenoid fossa”, which is simply a cavity for the bone to go into. This is just one aspect of this complex joint. It gets crazy.

Continue Reading » Shoulder Injury Prevention


© 2016 by Eric Troy and Ground Up Strength. All Rights Reserved. Please contact for permissions.