KIN 370 Notes

• Biomechanics is the meaning life and study of actions of foces
• Dynamics study of systems that accelerate
• Kinesiology is the study of human movement
• Kinetics is the study of forces with motion
• Sports medicine is the umbrella term that encompasses both clinical and scientific aspects of exercise and sport
• Biomechanists improve technique and prevent injury
• Qualitative is a description of quality with the use of number and quantitative involves description without numbers
• Qualitative information is used by clinicians and coaches while quantitative is used by researchers
• General motion is a combination of linear and angular
• linear motion is the movement along a line that may be straight or curved but moves in the same direction and speed
• Angular motion is rotation around a central imaginary line
• Mechanical system is an arm when throwing or a body when running
• Extension begins in anatomical position and moves in opposite direction
• Hyperextension is excessive movement of a joint beyond normal extension
• Frontal axis is perpendicular to sagittal plane while sagittal axis is perpendicular to frontal plane
• The three dimension cartesian coordinate system x is anterior, y is medial, and z is vertical
• The two dimension cartesian coordinate system x is horizontal and y is vertical
• Newtons first law of motion every object will remain at rest or in motion unless acted on by outside force
• Newtons second law of motion is acceleration of an object is directly related to forced and inversely related to mass
• Newtons third law of motion for every action there is an equal and opposite reaction
• Mass is quantity of matter an object contains while force is the push or pull acting on a body
• Free body diagram is a sketch that shows a defined system in isolation with all force acting on a system
• Center of gravity is a unique point around which the bodies mass is equally distributed
• Base of support is the two dimensional area that includes the part of the body in contact with the ground
• Line of gravity is the imaginary line running through the center of gravity towards Earths surface
• Stability is the resistance to disruption of equilibrium
• Increase body mass, amount of friction, and base of support
• Balance is a persons ability to control equilibrium
• Weight is the amount of gravitational force that exerts on a body
• Torque is the rotational effect of a force or moment arm
• Mechanical advantage is the ratio of moment arm of force to the moment arm of the resistance
• First class lever is the fulcrum between resistance and force arm
• Second class lever is resistance between fulcrum and force arm
• Third class lever is force between fulcrum and resistance
• Stress is created by force inversely related to the size of the area over which force is spread
• Deformation is the change in shape, stiffness, elasticity, bones, and ligaments
• Load-deformation curve is demonstrated tissue will respond based on how much force is replied
• Osteocytes is the structural building blocks of bone
• Osteoblasts build new bone while osteoclasts reabsorb bone tissue
• Bones are made up of collagen, water, calcium phosphate, and calcium carbonate