One of the first things we need to know before we start talking is that the active contraction of muscles is insufficient. What does it mean? For example, our biceps brachii, which spans the shoulder joint and elbow joint from the scapula, grows on our radius. We all know that the function of biceps brachii can bend the shoulder, elbow and forearm outward. Let's look at the action of seated preacher curl. We first drag our big arm up, Passively perform a shoulder flexion. At this time, the biceps brachii has been shortened. In this case, when performing elbow flexion, there will be insufficient active contraction, and the force of the biceps will be reduced. In this case, the muscle under the biceps brachii is the main source of strength. Many people will have a question here. You are right to say so, but when I perform sitting preacher curls, the biceps is very swollen, Didn't you say that the brachial muscles exert more force? Don't worry. Let's take a look at the geographical location of the brachial muscle. It grows under the biceps brachii. In anatomy, we will find that the cross-sectional area of the brachial muscle is much larger than the biceps brachii, and its strength is very powerful. Moreover, it is under the biceps brachii. After hyperemia, it pushes the biceps upward, making the biceps appear larger, so we will have this feeling.

Usage method:

1. Sitting or standing on the dumbbell seated preacher curl can also adopt the standing posture, with the chest against the inclined board, the upper arm on the board, holding the dumbbell / barbell with both hands back, and the arms straight to keep the body stable.

2. Lift the dumbbell / barbell bend to the highest point and stop.

3. Then restore slowly, fully extend your arms and move slowly; When the dumbbell / barbell drops to the lowest point, the elbow joint should be slightly flexed and the barbell should be controlled with force, but not fully extended.

4. Suggestion: after back training, do biceps training three times, each time starting from the seated barbell preacher curl training, and then use barbell standing bending or rope cross bending training.