Anatomy of muscles

Running is an excellent way to target many different parts of the body all at once. While not considered by most as a muscle-building exercise, it strengthens and tones a wide variety of muscles all through the body.

Anatomy of human forearm muscles, superficial anterior view. by Stocktrek Images

Our bodies are composed of over 650 muscles, which is divided into 3 major categories: the cardiac or heart muscle, the smooth muscles and the skeletal muscles that enable us to execute moves through voluntary contractions. In weight training, the most important focus is about the skeletal muscle, which represents approximately 40 per cent of our body mass. How does the muscular system work? How does muscle contraction work? What are the different types of muscles in the human body?

What is anatomical position and why is it important? It's the starting place for where we describe movement from in scientific terms and kinesiology.

Definition of Leg muscle in the Medical Dictionary by The Free Dictionary

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On the anterior and posterior views of the muscular system above, superficial muscles (those at the surface) are shown on the right side of the body while deep muscles (those underneath the superficial muscles) are shown on the left half of the body. For the legs, superficial muscles are shown in the anterior view while the posterior view shows both superficial and deep muscles.