Fig. 2
From: Shadow pitching deviates ball release position: kinematic analysis in high school baseball pitchers
The arm cocking (MER) and arm acceleration (BR) positions for each task. At the MER, the throwing motion of task 2 was not accurately performed in the spinal column and thoracic extension position compared with tasks 1 and 3 (arrows). At the BR position, the leaning of upper limbs of task 2 was greater than those of tasks 1 and 3. Abbreviation: MER maximum shoulder external rotation, BR ball release