The arch in the back during the bench press is a technique used by some powerlifters, bodybuilders and fitness enthusiasts to maximize muscle activation and to lift heavier weight. Here are some reasons why some people arch their back during the bench press:
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Greater muscle activation: Arching the back during the bench press allows for greater activation of the chest, shoulder and triceps muscles, while also reducing stress on the shoulder joint. This is because the arch creates a more stable base, which enables the lifter to press more weight.
Increased range of motion: Arching the back allows the lifter to lower the barbell further, resulting in a greater range of motion. This can lead to greater muscle activation and improved muscle development over time.
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Improved power output: Arching the back can also help to improve power output by creating a more efficient transfer of energy from the legs and core to the barbell.
Better leverage: Arching the back allows the lifter to get their upper body in a more favorable position for lifting heavy weight and can make it easier to press the weight up from a weaker position.
It’s important to note that arching the back during the bench press is not for everyone and it’s not a technique that should be used by beginners or by those who have pre-existing spinal or shoulder issues. It’s always best to consult with a coach or a physical therapist to make sure that arching your back during the bench press is suitable for you and to make sure you do it correctly.