LINEAR KINEMATIC APPLICATIONS Flashcards
Biomechanical Analysis
-Human movement described with numbers (quantitative analysis)
-measurement of
human movement and
causes of movement
Pros and Cons of Lab Data Collection
Pros: controlled environment, predictable, easy to study
Cons: not real-world setting, equipment intimidating to athlete
Pros and Cons of In The Field Data Collection
Pros: measuring skills during competition, athlete minimally affected
Cons: measurement tools not very portable
What is Motion Capture and Why Do We Use It?
- technique that allows study of details
- video provides limited quantitative data, we need to look at individual frames
Motion capture setup: camera has to be at 90 degrees to plane of motion. Tripod and far enough to see entire motion
Human Eye Capture Rate VS High Speed Camera
Human Eye- 24 Hz (24 pics were taken in 1 second)
High Speed Camera-500-10000 Hz
How to do basic analysis of movement
Camera, calculator, ruler=kinematic data
What is a Time Stamp
Time interval between pics
EX- if its 15 Hz then each pic is 1/15th of a second and that is the time interval
How to calculate movement time
multiply frame number by time stamp
Fixed Reference VS Moving Reference
Fixed: describes movement relative to environment
Moving: Examines movement of body segment
What does calibration mean?
Caliberation: finding a relationship between 2 variables
What is Digitization?
Digitization: representation of an object by series of markers
What are some measurements made with Motion Analysis?
Pressure Pads: using switch on the floor to measure velocity and time
Force Plates: using transducers to measure the forces involved in during motion
Electromyography: using specialized sensors to measure the muscle activity during movement
