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How the Body Works

The body is composed of several bones and muscle groups that make up the musculoskeletal system. For one to understand how the body works, they must first understand how everything is put together. If a trainer does not understand the specifics of the body they may injure someone or produce negative results.

Every muscle has an origin and insertion point into a bone. For example, the ribs are the origin of the external oblique. The lateral humerus bone is the insertion point for deltoid tuberosity. The coronoid process of the ulna is the insertion point for the brachialis muscle. Another major bone is the femur, located in the leg. The origin of the vastus intermedius is the upper two thirds of the anterior surface of the femur. The patella, also know as the knee on the lateral border is the insertion point for the vastus lateralis muscle. The scapula or shoulder blade is the insertion point for the pectoralis minor. More specifically, the muscle inserts into the coracoid process of the scapula. The thoracic vertebra which is comprised of twelve bones, in the spinious process of C7 is the origin of the rhomboid. The lumbar vertebrae, is the lower section of the spine consisting of five bones. The latissimus dorsi originates in the lumbar spinious process. The upper

two-thirds of the lateral surface of the tibia is the origin of the tibialis anterior. The clavicle or collar bone is the insertion point for the upper trapezious muscles. The specific insertion point is the posterior aspect of the lateral clavicle. The radius found in the forearm, is the insertion point for the brachioradialis muscle. The lateral surface and distal end of the radius at the styloid process is the actual location. The rectus abdominus muscle originates in the superior surface of the pubis bone around the syphysis. The fibula bone, which is right next to the tibia, connects to the soleus muscle. The muscle originates at the posterior surface of the proximal fibula. Furthermore, the cervical vertebrae which makes up the neck, consists of seven bones. The transverse process of the first four bones is the origin of the levator scapulae. The sternum located between the ribs, is the origin of the pectoralis major muscles. Finally, the ilium bone is the

origin of the gluteus maximus. The posterior one-fourth of the crest of the ilium is the proper position of the origin.

There are many more bones and muscles in the body. The way these bones and muscles connect can be intricate or very simple. Not to mention, joints and ligaments that also play a vital role in keeping the human body together. Before a personal trainer can offer the best advise possible, they must first understand how the body works to prevent injuries to clients and provide the most appropriate training.

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