Check writing reviews for the most trusted writing services reviews by students
Eazol Pain Relief Formula About Us
Painrelief-med. Natural pain relief.
Order Toll Free
FREE Newsletter Health News Journal
HOW MUSCLES WORK: NEED FOR ENERGY
One of the main characteristics of muscles is that they have a rich network of blood vessels, supplying nutrients and oxygen and removing waste products. Muscle contraction, producing tension or pull, is an active process, requiring energy. The shortening of the length of muscles is brought about by the protein of sarcomeres (actin, myosin) interweaving, like the 'teeth' of two combs sliding into each other. This tension/shortening pulls bones, the surfaces on which the tendons of muscles are attached, and causes movements.
Some motor units within any particular muscle are always active, even when the muscle is not contracting. The contractions of these muscle fibres do not produce enough tension to cause movement but they do tense and firm up muscles. This resting tension in a skeletal muscle is called muscle tone. Lack of muscle tone can make a muscle look limp and flaccid, whereas even with the slightest tone the muscles become alert. It is muscle tone that makes the biceps look as they are, even when they are not contracting. Muscle shapes are produced by muscle tone even in the resting position when most muscle fibres relax. Resting muscle tone stabilises bones and joints, while lack of it can allow a joint to collapse. For example, stroke victims with loss of muscle power in one arm often have the shoulder joint dislocated with the weight of the arm. The deltoid (around the shoulder joint) muscles are so flaccid that they cannot keep the head of the humerus bone fixed into the socket of the shoulder joint.
Muscle tone also helps to act as a shock absorber that cushions the impact of a sudden bump or shock. A strong muscle tone is essential for preparedness for sports and exercises where sudden movements happen. Exercises also build up muscle tone.
Information on this site is provided for informational
purposes only. It is not meant to substitute for medical
advice provided by your physician or other medical
professional. You should not use the information contained
herein for diagnosing or treating a health problem or
disease, or prescribing any medication. You should read
carefully all product packaging and labels. If you have or
suspect that you have a medical problem, promptly contact
your physician or health care provider. Information and
statements regarding dietary supplements have not been
evaluated by the Food and Drug Administration and are not
intended to diagnose, treat, cure, or prevent any disease.
These statements have not been evaluated by the FDA and are not intended to diagnose, cure, treat or prevent disease. Consult a health professional if you have any questions.