6834 Lecture Notes - Lecture 1: Injury Prevention, Linear Motion, Pythagorean Theorem
21 Jun 2018
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Lecture 1
What is biomechanics
- Science of technique
- Broken down into 2 categories
oPerformance enhancement
oInjury prevention
- Can also be split into
oKinetics
Explain movement (focuses on forces of movement)
Force
oOften more abstract
oLinear point of view
Moments
oRotational point of view
Ie joint movement in knee, ankle or hip
oKinematics
Described movement (the outcome movement) ie jump height
Velocity
Distance
Acceleration
- Qualitative vs qualitative
oFocus on qualitative and somewhere in middle
oQualitative: high end motion capture
oQuantitative: software packages; we are focusing on 2D pattern analysis
- What can a biomechanist do?
oProduct testing
Revolves around mechanics before the person and with the product
oForensic
Assess things such as crashes, OHS
oClinical
find more resources at oneclass.com
find more resources at oneclass.com
Ie physio
Gait analysis
oSports performance – training
Used to assess loads and powers for strength and conditioning ect
oSports performance – technique
Specific to sport
Ie bowling in cricket
Linear Kinematics
- (or describing movement using position, velocity and acceleration)
- Q: in a 200m running race who is most likely to win? Athlete with the fastest acceleration or
the athlete with the highest top speed? How can I calculate this?
- Stage 1: describing and defining motion
oLocation of origin dictates the position
oCo-ordinates are then used to define the position
X,y
Always refer back to the origin
Helps find where they are in a particular space
oTypes of motion
Linear motion (translation)
Rectilinear
Curvilinear
Angular motion
Central axis = axis of rotation
oMost motion at joint are angular, often translation
movement occurs too
General motion = combination
- Stage 2: how far has the athlete run?
oDistance
Scalar quantity
Only defined by magnitude
No directional component
find more resources at oneclass.com
find more resources at oneclass.com
Document Summary
Broken down into 2 categories: performance enhancement, injury prevention. Force: often more abstract, linear point of view. Ie joint movement in knee, ankle or hip: kinematics. Described movement (the outcome movement) ie jump height. Qualitative vs qualitative: focus on qualitative and somewhere in middle, qualitative: high end motion capture, quantitative: software packages; we are focusing on 2d pattern analysis. What can a biomechanist do: product testing. Revolves around mechanics before the person and with the product: forensic. Assess things such as crashes, ohs: clinical. Gait analysis: sports performance training. Used to assess loads and powers for strength and conditioning ect: sports performance technique. Linear kinematics (or describing movement using position, velocity and acceleration) Stage 1: describing and defining motion: location of origin dictates the position, co-ordinates are then used to define the position. Helps find where they are in a particular space: types of motion.
