![]() Thus, the short head will be worked to a greater extent in these exercises. as if performing a biceps pose in bodybuilding). Given that the long head of the biceps also has a secondary role in abduction of the shoulder, it also will become actively insufficient when performing curling movements where the the arms are raised out to the sides (i.e. ![]() ![]() Conversely, during performance of movements where the upper arm is held out in front of the body, the long head is slackened to a greater degree (a phenomenon called active insufficiency) and therefore force production is compromised. Why is this significant? Well, during performance of exercises where the upper arm is held behind the body, the long head is placed in a greater position of stretch compared to the short head and therefore is able to generate maximal force. The long head of the muscle crosses the glenohumeral joint at the shoulder while the short attaches at the coracoid process on the front aspect of the scapula (shoulder blade). The biceps brachii is a two-headed muscle, comprised of the short head (which sits on the inner portion of the upper arm) and the long head (which sits on the outer portion of the upper arm). Want to improve the development of your biceps? If so, it’s necessary to understand a little applied anatomy.
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