Backed by research

Learn the science behind each test and the potential impact on your arm

Internal Rotation Strength

Both velocity and accuracy decrease when the internal rotators become fatigued.

External Rotation Strength

The brakes for your arm…weak external rotators are linked to arm injuries.

Scaption Strength

Preseason scaption weakness increases your risk of throwing related injury.

Internal Rotation ROM

Loss of IR range of motion can alter shoulder biomechanics and increase the risk of injury.

External Rotation ROM

Change in ER range of motion can be early signs of an injury, fatigue, or a response to muscle tightness.

Flexion ROM

Limited or asymmetrical shoulder flexion is linked with an increased risk of elbow injury in pitchers.