It's a bird, it's a plane, it's...an axis?
Name 1 activity that occurs in each of the 3 planes
ie: STS- sagittal, jumping jack- frontal, supine twist- longitudinal
What are the 3 different kinetic chain link principles?
combined, sequential, simultaneous
Name 2 variables that are considered scalar
ie: having only magnitude
- speed, distance
What is the difference between a kinematic and kinetic measuring device?
Kinematic- has to do with measuring movement
Kinetic- force measurement
Define stride vs. step
stride: ipsilateral heel contact to ipsilateral heel contact
Step: ipsilateral heel contact to contralateral heel contact
When you nod your head yes, your cervical spine is moving about the _______ axis.
Horizontal (medial-lateral)
Name 2 activities that occur within the simultaneous kinetic chain link principle
ie: Shot put, sprinting, broad jump
What is the difference between displacement and distance?
Distance is how far something traveled, displacement is how far and in what direction
Give an example of a kinematic and kinetic measuring device
Kinematic: ie: exoskeleton device, goniometer
Kinetic: dynamometer, suitcase weight dynamometer
Describe 2 things that occur during stance when walking speed increases
- single limb support increases
- arm swing speed increases
- double limb stance periods are shortened
Give an example of a multiplanar activity
ie: running the hurdles, curtsy lunge/step-up, baseball swing/pitch, golf swing
Describe the difference between the sequential and simultaneous kinetic chain link principles
Sequential: movements must occur in a specific order in order for the right activity to occur, one movement is followed by another, different movement
Simultaneous: movements build on one another over time, force is increased about the same movement during a span of time
What is Newton's 1st law of motion (inertia)?
An object will remain in rest or in uniform movement unless acted upon by another force
timer, bed alarm
Define the passenger unit
70% of BW, head, neck, arms trunk
Provide 2 examples of osteokinematic movements that occur on the anteroposterior axis
Hip Abduction, shoulder adduction
ie: Tennis serve
Power is generated over time during the wind-up of the tennis serve- spine extension and knee flexion building up for release- followed by a series of specific trunk and UE movements in order to come in contact with the ball
If you move your arm from neutral to 50* abduction, then to 100* abduction, then back to 25* abduction, how much distance in degrees did the arm travel?
175*
What is the difference between shutter speed and frame rate?
Shutter speed: amount of time each individual frame is exposed to light
Frame rate: number of pictures captured per second
Linear distance between heels of opposite feet is:
step width
During a squat, describe the osteokinematic movements that occur about the ankle in the prep, execution, and follow through phases
DF, PF, PF
Describe the 3 phases of movement and define them.
Prep- preparing the body for acceleration or force-producing phase
Execution- acceleration or force production point of an activity
Follow-through- slowing the moving body down
Finish the phrase: every force will have an ____________________ reaction
equal and opposite
The human eye samples at _________
24 Hz
What is the norm for veritcal and horizontal displacement in the gait cycle?
~2 inches
vertical - 2 in, horizontal- less than 2 inches