Three groups of muscles make up the shoulder. The anterior, middle and posterior deltoids are responsible for the rotation and abduction of the arms. Shoulder strength is important for bodybuilders, as they need strong deltoids to lift heavy...
The pectoralis minor is a small, triangle-shaped muscle located on the outer side of your upper chest. It connects your third, fourth and fifth ribs to the top of your shoulder blade and functions to stabilize the shoulder blade. Tightness of the...
The pectoralis major and minor make up the major muscles in the chest. Suffering a tear in either one of these muscles can be painful. Knowing the causes, treatment and prevention of chest muscle tears can help you get back to playing sports,...
Paradoxical breathing is seen when inhalation results in a decreasing, or asymmetrical, chest movement rather than a normal chest expansion. This causes poor ventilation of the lungs, carbon dioxide buildup and oxygen depletion in the blood....
If your nipples hurt when you're running, you likely have a condition called jogger's nipple, which is caused by chafing. Jogger's nipple can be prevented by wearing clothing made of soft materials or applying a barrier between your nipples and...
The pectoral muscles, located in the chest, have two parts: pectoralis major and pectoralis minor. The pectoralis major makes up the bulk of your chest muscle. For women, it lies under your breasts and, depending on your breast size, may be...
One and a half million heart attacks occur every year in the United States, according to the Women's Heart Foundation. About a third of those people die. Though most heart attacks are caused by a blood clot, some can be caused by a muscle spasm in...
