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|  |  | | | | | :: H :: | | | | | |  | | Hamstrings | | | | The name for 3 muscles on the back of your thighs, running from the lower part of the pelvis to immediately below the knees. They permit you to bend your knees and straighten your legs at the hips. | | | | | | | | Healthy Heart Zone | | | | This zone, 50-60% of your maximum heart rate, has been proven to help decrease body fat, blood pressure and cholesterol. It also decreases the risk of degenerative diseases and has a low risk of injury. | | | | | | | | Heart Rate Monitor | | | | A device using monitor strap, held in place around the chest by an elastic band that measures and displays your heart rate while exercising. The heart rate is displayed on a watch, badge, or translated into sound through earphones. | | | | | | | | HGH (Human Growth Hormone) | | | | This hormone regulates the normal growth and development of the body. It is produced in the pituitary gland and is sometimes misused by athletes to increase strength and muscle mass. | | | | | | | | High Density Lipoprotein | | | | A good cholesterol lipoprotein that contains more protein than cholesterol and removes excess cholesterol from the body. | | | | | | | | Hormones | | | Secreted by the endocrine glands, Hormones are chemical agents that effect specific organs and elicit specific responses. The organs most responsible for producing hormones are the pituitary gland and the testes. By activating and deactivating enzymes, hormones regulate various biological processes. One example of this regulation is the effect of the testosterone hormone on enzymatic activity, relating to protein production of muscle cells. Hormones, such as insulinand glucagons, control blood sugar levels and energy storage in the body. Hormones can either be made of proteins or cholesterol. |  | | | | | | | | |
