Benefits of Incline Bench Press September 24, 2018 Jessica Anderson Your chest muscle (pectoralis major) is made up of two separate muscles: the lower (sternal) head, which is activiated during flat and decline bench, and the upper (clavicular) head, which is activated during incline bench. If your goal is to add mass to the upper portion of your chest try adding incline bench to your workout! Live Fit would love to help you meet your fitness goals quickly and efficiently by creating a customized workout plan based on your goals. Come in today to find out all of the benefits of a certified personal trainer.