Medically reviewed by Kashif J. Piracha, MD The diaphragm is a dome-shaped muscle that separates the chest from the abdomen. This muscle, also called the thoracic diaphragm, is the main muscle used ...

Strengthening the chest muscles, including the pectoralis major and minor, enhances your overall upper-body strength, making it easier to perform daily tasks that involve pushing and lifting.

If you want to build a bigger chest in time for summer but are new to strength training and don’t know where to start, then this workout can help. Walking into a gym and being swamped by crazy ...