Barbell is an indispensable exercise tool in the fitness industry. With barbell, you can quickly improve muscle strength and circumference. In addition to common straight barbells, how much do you know about curved barbells? According to fitness instructor Deng Chongyang, it has better flexibility than a straight bar, can protect the wrist and increase angle changes, and is particularly suitable for sculpture arm details. Coach Deng said that curved bars and straight barbells each have their own advantages. In general, a bench press for pectoralis major exercise and a shoulder press for exercise deltoid muscles will choose a straight barbell. If you are flexing and stretching the barbell arm for triceps training, you can only choose a curved rod, and you cannot use a straight rod instead. In these actions, the angle of the wrist is adjusted by a curved lever to achieve different angles to stimulate the target muscles, which cannot be achieved by a straight barbell. Both curved and straight barbells can perform curls, which is more beneficial for biceps? This is the question of many fitness enthusiasts. Coach Deng explained that the biceps has two heads: a long head and a short head. The long head is connected to your back shoulder through the shoulder joint. In the standing position, the straight bar emphasizes the short head of the biceps because the short head is in a very good position, while the curved bar is just the opposite. The long head is mainly stimulated by the biceps. The long head is not the position where it is easy to exert force during the standing curl.