Arm Fatigue, Jerky Movement, mild stiffness, shaky! Arm Fatigue, Jerky Movement, mild stiffness, shaky! Arm Fatigue, Jerky Movement, mild stiffness, shaky! Arm Fatigue, Jerky Movement, mild stiffness, shaky! Arm Fatigue, Jerky Movement, mild stiffness, shaky! Arm Fatigue, Jerky Movement, mild stiffness, shaky!