fitness equipment series dual-use chest expander

The benefits of using a pull-up machine lie in the fact that the biceps brachii is a muscle with two heads, and its primary function is to flex the arm. During flexion, another muscle, the brachialis, is also involved. However, the brachialis does not receive sufficient exercise unless performed in movements that involve raising the forearm, such as high-position pull-up or reverse high-position pull-up machine exercises. Additionally, the brachialis brachialis, the main muscle in the upper forearm, plays a significant role in flexion movements. The side pull-up machine can strengthen the brachialis brachialis.