hammer curl targets the bicep branchi and preacher curl targets the lower area of biceps..
The main difference between a cross body hammer curl and a regular hammer curl is the direction in which the arms move during the exercise. In a cross body hammer curl, the arms cross over the body while curling the weights, engaging different muscles compared to a regular hammer curl where the arms move straight up and down.
The main difference between a hammer curl and a cross body hammer curl is the direction in which the weight is lifted. In a regular hammer curl, the weight is lifted straight up towards the shoulders, while in a cross body hammer curl, the weight is lifted diagonally across the body towards the opposite shoulder. This variation targets different muscles in the arms and can provide a more comprehensive workout for the biceps and forearms.
a hammer curl
The primary muscle attached at the point of insertion is the muscle that undergoes the most movement when the muscle contracts. For example, in the bicep curl exercise, the bicep muscle is the primary muscle attached at its point of insertion on the radius bone in the forearm.
The Agonist muscle. In contrast, the muscle group that has passive action(the muscle being stretched) is called the antagonis muscle. For example, when doing a bicep curl. Your biceps are the agonists and your triceps would be the antagonists.
Chin-ups, just as most exercises use a primary & secondary muscle group. The primary muscle group would be the back (or latissimus dorsi). This is what helps to give that "V" - shape in the torso area. (along with slimming down the torso area, of course) The secondary muscle group would be the biceps. Depending on your grip position, you can focus either more on your "lats", or arms.
During a crossbody hammer curl exercise, the muscles primarily targeted are the biceps brachii and the brachioradialis.
if you're speaking anatomically (as in origin and insertion), the origin of the bicep curl would be its fixed attachment at the supraglenoid tubercle and the coracoid process (two heads), as a bicep curl is an open chain motion (distal end is free moving --> proximal end is the origin). it would be more correct, though, to say refer to it as the origin of the biceps during a bicep curl.
During a cross body hammer curl exercise, the muscles primarily worked are the biceps brachii and the brachioradialis.
The preacher curl exercise primarily targets the biceps muscle group.
A curl-up on a stable surface, rectus abdominis muscle activity was 21% of MVC and external oblique muscle activity was 5% of MVC.