During forearm accelerations, triceps brachii I muscles extend elbow joints. Incorrect curve pitching techniques place elbow joints at risk. If triceps brachii I muscles incorrectly powerfully extend elbow joints, ulnas' olecranon processes can slam into humerus' olecranon fossas. Olecranon process tips break off. Olecranon fossas calcify.
Extension elbow joint motion ranges decrease.
Correct curve pitching techniques move olecranon processes and fossas lateral to elbow joint extensions. Triceps brachii II muscles are pure elbow joint muscles. II muscles directly extend ulnas. During forearm accelerations, triceps brachii II muscles combine with medial epicondyle muscles to medially extend elbow joints. Elbow joint muscles master complicated force application patterns or suffer centrifugal acceleration injuries.