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Negative Energy Balance Caloric intake less than energy output that causes loss of body weight and body fat. Negative Nitrogen Balance The loss of nitrogen caused by inadequate protein in the diet. Also caused by inadequate calories, starvation, fever, malnutrition and trauma. Negative Self-Monitoring Remembering failures, but not successes. Negative or Negative Work The work of an external force on a muscle undergoing eccentric action. Work that occurs when a joint angle is changing in the opposite direction of the line of pull of the muscle. Net Force The resultant force that is the vector sum of all forces on a joint. Neuromuscular Feedback Theory The theory that determined imaging of an athletic activity will cause a slight innervation of the same muscles that are actually used to perform the actual athletic activity. Newton's Laws of Motion First Law = Law of Inertia. Second Law = Law of Acceleration. Third Law = Law of Action-Reaction. Norepinephrine (NE) A catecholamine and hormone that causes increase blood pressure, increased rate and depth of breathing, and increased total peripheral resistance. NE vasoconstricts most blood vessels, except vessels to cardiac muscle and exercising skeletal muscle. It is secreted by the sympathetic nervous system and the adrenal medulla. Normal Sinus Rhythm (NSR) The normal heart rate and rhythm as recognized by EKG.   HOME | Site Map | Center Stage | Our Solutions | Our Satisfied Clients | Fitness Topics PFP Newsletter | Company Profile | Contact Information | Help | Glossary | ?Mark | About the Author | Disclaimer ©Copyright 1999-2003 Apriori, Inc. All Rights Reserved. APRIORIATHLETICS and Progressive Fitness Personality are Service Marks of Apriori, Inc. All products mentioned are trademarks or registered trademarks of their respective owners.