This action stimulates the triceps brachii with instruments. The kettle bell is used in the picture. In the gym, barbells, dumbbells, elastic belt, ropes and other instruments can be used to do this action. If you are not at home, you can use these professional equipment or self-made equipment to achieve your goals, whether it is mineral water or books or other heavy objects in your schoolbag. It is necessary to control your training weight. Generally, a group can do it 8~ 12 times.

Not only standing posture, but also sitting posture and supine posture. The purpose of recommending standing posture is to consider that it is inconvenient to use the other two postures for homemade heavy objects. When doing this, keep the body straight, lock the shoulder joint and wrist joint, and use the triceps brachii to drive the forearm stomach medicine elbow joint to move. Keep the body stable, stop when the arm is straight, and keep the "contraction peak position".

Bow and stretch after defecation.

This action is to train the arm through self-weight and stimulate the triceps brachii, which can only be carried out with the participation of the bench. It is an isolated form of reverse flexion and extension, also known as supine back support, which is difficult to control, so it is required to practice the triceps brachii after reaching a certain strength.

Lie on your back, put your hands on a slightly higher stool behind your back, and hang your feet on the ground or other parts of your body on a shorter stool. At first, relax your shoulders, bend your elbows slowly and try to sink as much as possible. When your body sinks, you should move smoothly and feel the strength of the triceps brachii. Then stretch your arms hard to prop up your body and restore it. With the help of the contraction force of triceps brachii, the arm is straightened, and triceps brachii is in the position of "contraction peak" and pauses. Repeat the above action process.