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UGA KINS 2010 - Biomechanics of Physical Activity

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Chapter 10: Biomechanics of Physical ActivityStatement: When players become airborne they are easier to tackle because they don’t weigh anything. True or False?FalseWhat are the three types of muscle contraction?Isometric- exerting force without movementConcentric- shortening movement of the muscle while it’s contractingEccentric- lengthening movement of the muscle while it’s contractingWhat is the name of Newton’s First Law of Motion?Law of Inertia: an object that’s in motion will remain in motion and an object that is at rest will remain at rest unless there is an outward force acting upon the objectWhat is Biomechanics?Biomechanics in the field of physical activity applies the mechanical principles of physics and engineering to the motion, structure, and functioning of the human bodyFunction: how we produce forces to generate, maintain, or slow down movement during physical activityStructure: how forces affect our body tissueGoal: understand how the basic laws of physics affect and shape the structure and function of the human bodyApply this understanding to:Improve the outcomes of our movements (such as performance and effectiveness)Increase or maintain the safety and health of our tissuesExamples:Nano-biomechanics: measure forces, stiffness, elasticity at subcellular level to detect disease- micro levelMacro level: understanding locomotion of biological organismMechanical PrinciplesAny principle that uses force to explain how:To create/maintain/reduce motionTissue is affected by loadingSpecifically:How external forces act on performersHow internal forces act on performersHow biomechanical laws of nature shape our movementsNewton’s Laws of MotionLaw of Inertia: every body continues in its state of rest or uniform motion in a straight line unless it is compelled by external forces to change that stateLaw of acceleration: the acceleration of a body is proportional to the force causing itForce = mass x accelerationLaw of Action-Reaction: for every action there is always an equal and opposite reaction/forceKINS 2010 1st Edition Lecture 19 Outline of Last Lecture I. What are the pros to participating in sport?II. Symptoms of concussionsIII. Risk Compensation TheoryIV. Myths on ConcussionsOutline of Current Lecture I. What are the 3 types of muscle contractions?II. What is biomechanics?a. Goal of biomechanicsIII. Mechanical PrinciplesIV. Newton’s Laws of MotionCurrent LectureThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute. Chapter 10: Biomechanics of Physical Activity Statement: When players become airborne they are easier to tackle because they don’t weigh anything. True or False?- False What are the three types of muscle contraction?- Isometric- exerting force without movement- Concentric- shortening movement of the muscle while it’s contracting- Eccentric- lengthening movement of the muscle while it’s contracting What is the name of Newton’s First Law of Motion?- Law of Inertia: an object that’s in motion will remain in motion and an object that is at rest will remain at rest unless there is an outward force acting upon the object  What is Biomechanics?- Biomechanics in the field of physical activity applies the mechanical principles of physics and engineering to the motion, structure, and functioning of the human bodyo Function: how we produce forces to generate, maintain, or slow down movement during physical activityo Structure: how forces affect our body tissue- Goal: understand how the basic laws of physics affect and shape the structure and function of the human bodyo Apply this understanding to: Improve the outcomes of our movements (such as performance and effectiveness) Increase or maintain the safety and health of our tissues- Examples:o Nano-biomechanics: measure forces, stiffness, elasticity at subcellular level todetect disease- micro levelo Macro level: understanding locomotion of biological organism Mechanical Principles- Any principle that uses force to explain how:o To create/maintain/reduce motiono Tissue is affected by loading- Specifically:o How external forces act on performerso How internal forces act on performerso How biomechanical laws of nature shape our movements Newton’s Laws of Motion- Law of Inertia: every body continues in its state of rest or uniform motion in a straight line unless it is compelled by external forces to change that state- Law of acceleration: the acceleration of a body is proportional to the force causing ito Force = mass x acceleration- Law of Action-Reaction: for every action there is always an equal and opposite


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