Inclusion Criteria:

• Age 15-30 years, inclusive.
• Male gender.
• Active participation in competitive baseball as a pitcher.Should be competing at the high school or collegiate level.
• No current musculoskeletal complaints for which the subject is being treated.
• Full pain-free range of motion (ROM) of the bilateral upper and lower limbs.
• Willingness to participate in the study

Exclusion Criteria: 

• Current upper limb, lower limb, or spine musculoskeletal pain complaint for which the subject is taking prescribed medication, has modified activity, or received treatment from a medical care provider.
• History of fracture, dislocation, subluxation, or separation affecting the cervical spine, thoracic spine, rib cage, elbow, or either shoulder girdle.
• History of rotator cuff injury, elbow injury, or shoulder instability for which the subject has been evaluated and/or treated in the past 12 months.
• History of dominant side shoulder or elbow surgery.
• Known neurological, visual, or vestibular disease affecting balance or coordination
• Congenital deformity of the neck, upper extremity, or lower extremity.
• Congenital or acquired scoliosis or significant thoracic kyphosis (> 30 degrees).
• History of connective tissue disease (defined as rheumatoid arthritis, systemic lupus erythematosus, or a seronegative spondylarthropathy).