The optimal range of all possible movements.
Posture vs. Movement
The optimal range of all possible movements is the middle 2/4ths of the range of motion.
0 degrees = neutral position for all joint angles.
Neck Flexion and Extension: 0-23 Degrees (that’s probably a lot less than you would want in order to look at the fretboard).
Neck Rotation: 0-40 Degrees.
Neck Lateral Flexion: 0-25 degrees
Shoulder forward flexion: 0-90 degrees
Shoulder external rotation: 0-45 degrees
Shoulder Abduction: 0-95 degrees
Shoulder External rotation: 0-45 degrees
Elbow Flexion/Extension: 25-125 degrees
Forearm pronation: 0-60 degrees
Forearm supination 0-65 degrees
Wrist flexion: 0-65 degrees
Wrist extension: 0-65 degrees
Wrist radial deviation: 0-15 degrees
Wrist ulnar deviation: 0-23 degrees
Finger Metacarpal Phalangeal flexion/extension: 20-60 degrees
Finger Proximal inter-phalangeal flexion/extension: 25-75 degrees
Finger Distal inter-phalangeal flexion/extension: 20-60
Thumb basal joint Palmar Adduction/Abduction Contact/45
Radial Adduction/Abduction Contact/60
Thumb Interphalangeal Hyperextension/Flexion 15H/80
Thumb Metacarpophalangeal Hyperextension/Flexion 10/55