A little kinesiology and biomechanics lesson might explain this one, fellas. In all, the two heads of the bicep brachii combine to cross three joints: the humeroradial and humeroulnar (elbow), and the glenohumeral (shoulder). The biceps brachii are most commonly viewed as elbow flexors, but what most trainers don’t realize is that they have several other functions: supination of the forearm and transverse flexion at the shoulder. And, of most importance to this discussion, the biceps brachii (especially the short head) also contributes to shoulder flexion.
When the shoulders are more flexed (as in a preacher curl), the biceps are put in a state of active insufficiency. Active insufficiency is the limited ability of a muscle that crosses two or more joints to produce optimal force when a specific joint position places the muscle on ?slack.? Active insufficiency explains why we can lift more weight on a standing barbell curl (shoulder extended) than we can on a preacher curl (shoulder flexed). That being said, in a preacher curl, you put the muscle at a mechanical disadvantage: something that we are programmed to avoid subconsciously. Since it is essentially an unnatural position for us, it puts us at an increased risk of injury, so moderation in usage is best for keeping the tissues involved in elbow flexion healthy. The preacher curl is still a great exercise; it?s just that some people can tolerate it for prolonged periods better than others.
I?m willing to bet that you?ve got a case of bicipital tendonitis, the causes of which include: Poor lifting techniques, chronic repetitive upper extremity activities (e.g. overhead throwing athletes), overload (usually eccentrically), lack of flexibility, anatomical abnormalities (eg, fractures, first rib subluxations). Ice it for 20-30 minutes every 3-4 hours for 3-4 days or until the pain goes away. Be sure to avoid any activities that aggravate it, too.
How can you not like tribex burps?