In this study, we aimed to study the validity and reliability of the Angle Meter, a Smartphone application for elbow joint position sense.

The validity and reliability of the elbow joint position sense with the mobile application will be evaluated with the angle meter. This application works on phones with the IOS operating system. The validity and reliability of the Angle Meter will be evaluated by comparing it with a small universal goniometer for measuring elbow range of motion. The elbows of healthy subjects will be photographed at 3 different angles in the open and kinetic chain position. The elbow photo of healthy individuals measured with the Angle meter will be evaluated simultaneously but independently with the Angle meter by 2 different evaluators. The measurements will be repeated after 3 days. It will be noted that each picture is sufficient, i.e. there is no obvious perspective error.

Inclusion Criteria:

• Being between the ages of 18-25
• Being healthy
• Agreeing to participate in the study

Exclusion Criteria:

• Those who have had upper extremity surgery within the last year
• Those with neurological, orthopedic, rheumatic or cardiovascular problems affecting the neck, shoulder, elbow, hand and wrist
• Those with central and peripheral nervous system involvement Having pain anywhere in the body

healthy individuals