The brachialis is stretched with full extension of the forearm at the elbow joint, and the forearm halfway between full supination and full pronation at the radioulnar joints.
Note: The halfway pronated/supinated position is done to slacken the brachioradialis and also the biceps brachii as well, so they do not limit the stretch.
![The brachialis is stretched with full extension of the forearm at the elbow joint, and the forearm halfway between full supination and full pronation at the radioulnar joints.](https://learnmuscles.com/wp-content/uploads/2017/10/Brachialis-stretch-783x1024.jpg)
The brachialis is stretched with full extension of the forearm at the elbow joint, and the forearm halfway between full supination and full pronation at the radioulnar joints.