1, keep your upper body completely straight, your feet slightly open, your hands are in the same line with your shoulders, and your arms are half bent.

2. Lower your body until your chest can almost touch the ground.

3. Finally return to the initial state.

4. Put your hands on an object above the horizontal plane, then lean forward, shrink your upper arm at the same time, and press down slowly.

5. Then put your feet on the table and keep your body in a horizontal posture. These methods can exercise biceps brachii.