Dumbbell bending hammer is a kind of fitness exercise. Bending hammer is the trump card to exercise biceps brachii and forearm at the same time. The bending hammer can stimulate the brachial muscle alone, which is usually called the lateral upper arm. The long and short heads of biceps brachii, deltoid, upper trapezius, levator scapulae, flexor carpi radialis and extensor carpi radialis all play a stabilizing role.

These stable muscles help to maintain correct posture and movements, and at the same time stabilize the joints through contraction. Hammer bending can exercise the biceps brachii and brachialis radialis of the arm well, which will make the arm muscles more three-dimensional.

The difference between horizontal hammer lifting and hammer lifting is that the forearm needs to be pulled forward. Such a small change will bring unprecedented experience, especially the activation of brachialis and brachioradialis.

Biceps brachii:

The biceps brachii (biceps brachii) is located in front of the upper arm, and the whole muscle is fusiform. Biceps biceps brachii has long and short heads, hence the name. Biceps biceps brachii (G not gōng) belongs to quadriplegia in three skeletal muscle groups.

The long head starts from the glenoid tuberosity of the scapula, and the short head starts from the coracoid process of the scapula. The long head and the short head meet in the middle of the humerus to form a muscular abdomen, and then descend to the lower end of the humerus. The intact tendon stops at the trochanter of radius and the aponeurosis of forearm.

When near fixation, the biceps brachii makes the forearm bend outward at the elbow joint and the upper arm bend at the shoulder joint; When far fixed, the biceps brachii brings the upper arm close to the forearm. The observation of EMG shows that only when the forearm rotates outward to make the palm forward and bend the elbow, the biceps brachii has obvious EMG activity.