Week 5 Flashcards
The very first angle at the beginning of stance phase is called the
Angle at initial contact
The peak angle and the angle at initial contact can be the same angle
True
Angular excursion is the total range of motion the joint moves in a specific direction
True
Which of the following ankle kinematic patterns appear to be the most problematic in regards to running injury risk
Prolonged eversion
Why is looking at the knee flexion angle at initial contact important during a running analysis
Too much knee extension at initial contact increases stress on the knee
Which of the following is not a component of medial collapse
Hip abduction
Running kinematics are generally very similar for males and females suffering from patellofemoral pain
False
Landing with knee valgus during cutting is actually ok and not a risk factor for injury
False
Which of the following is not a sign of bad jump landing biomechanics
Elevated hip flexion
Which of the following is a hallmark of instability for any kinematic graph
Large and/or numerous spikes, dips and parabolas
What tools are required for 3D motion capture
Calibration wand
Reflective markers
Cameras
Measuring device
Software/computer
What 3 things have to be done for system calibration
Masking
Wave the wand
Set up origin
What is masking
Getting rid of all the reflective points in lab
Subject calibration depends upon
Anthropometrics
Marker set used
Stand in the middle of origin to take a picture
What anthropometric measures are required in plug in gait
Leg length Ankle width Knee width Height Weight
What is overstriding
What does it cause
When the knee is very extended and landing way out in front of center of mass
Increase force at the knee and can lead to injury
What causes problems in runners
Prolonged eversion
What does forefooot running cause
Increase force at the ankle
What is medial collapse consist of
Knee valgus
Hip adduction
Hip internal rotation
Pelvic drop
Trunk lean
On a graph that involves stance phase and the joint angle, where is:
Angle at initial contact
Angle at toe off
Peak angle
First data point
Last data point
Highest or lowest data point
What is a peak angle
Most extreme angle
What is angular excursion
Total range of motion the joint moves in a specific direction
Is foot pronation (eversion) good for running
Eversion is actually good
But prolonged (high duration) is actually what is bad
Prolonged eversion can lead to _____
Not related to _______
Achilles tendinopathy
and Medial tibial stress syndrome
NOT related to greater excursion, greater angle or greater velocity
Female runners with patellofemoral pain show to have greater
Hip adduction, hip internal rotation and shank internal rotation
And
Less contra lateral trunk lean
Males with patellofemoral pain showed to have greater
Compared to healthy males
Compared to females with PFP
Peak knee adduction, peak knee external adduction compared to healthy males
Less peak hip adduction and greater knee adduction compared to females with PFP
When is the ACL most stressed
When knee is placed in:
Valgus position
Femur is internally rotated on fixed tibia
2/3 of ACL injury is due to
NON CONTACT
Bad cutting mechanism include
Too much knee valgus
Pelvic drop
Hip adduction
Good cutting mechanism includes
Hip abduction
Small valgus
Pelvis level
What is the main way we fix an ACL
Motor relearning - teaching people how to cut
Bad jump landing mechanism includes
Too much Valgus
Too much Hip adduction
Too much Pelvic drop
Limited hip and knee flexion
Overall what should we look out for in Running analysis
Ankle eversion
Knee flexion
Knee valgus
Hip adduction
Hip internal rotation
Overall what should we look out for in Cutting analysis
Ankle eversion
Knee flexion
Knee valgus
Hip adduction
Hip internal rotation
Overall what should we look out for in Jump landing analysis
Ankle eversion
Knee valgus
Hip adduction
Knee flexion
Hip flexion
